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Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison

Oral-B iO Series Comparison

The iO6 is the best value, the iO9 is the best if you want the tech

Best value – iO Series 6 (Amazon, Oral-B)

Best budget – iO Series 3 (Amazon, Oral-B)

Best tech – iO Series 9 (Amazon, Oral-B)

All of the iO Series brushes have a 2 minute timer, pacer and pressure sensor. These are the key features that dentists recommend.

All models clean your teeth as well as each other.

What sets them apart are additional features. Examples include more brushing modes, in-handle display and ‘smart’ (Bluetooth) technology. These are nice-to-have, but not critical.

The iO6 is the best value option. It strikes the balance between additional features and price. It has some smart features, but not the full suite. 

The iO3 is the most affordable. It does not have smart features.

The iO9 is for those who want all the tech and are prepared to pay for it. It offers far more than you need.

Brush Name
Oral-B iO Series 3
Our Choice
Oral-B iO Series 6
Oral-B iO Series 9
Oral-B iO Series 3 Electric Toothbrush with (1) Brush Head, Rechargeable, White
Oral-B iO Series 6 Electric Toothbrush with (1) Brush Head, Gray Opal
Oral-B iO Series 9 Electric Toothbrush with 3 Replacement Brush Heads, White Alabaster
Best budget
Best value
Best tech
Main Differences
No display / 3 cleaning modes / no Bluetooth / standard charger
Black & white display / 6 zone tracking / 5 cleaning modes / standard charger
Color display / 16 zone tracking / 7 cleaning modes / In the case charging
Electric Teeth Rating
5/5
5/5
5/5
Approx. Price
$75.95
$149.97
$283.99
View on Oral-B
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 1
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 2
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 2
Brush Name
Oral-B iO Series 3
Oral-B iO Series 3 Electric Toothbrush with (1) Brush Head, Rechargeable, White
Best budget
Main Differences
No display / 3 cleaning modes / no Bluetooth / standard charger
Electric Teeth Rating
5/5
Approx. Price
$75.95
View on Amazon
View on Oral-B
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 1
Our Choice
Brush Name
Oral-B iO Series 6
Oral-B iO Series 6 Electric Toothbrush with (1) Brush Head, Gray Opal
Best value
Main Differences
Black & white display / 6 zone tracking / 5 cleaning modes / standard charger
Electric Teeth Rating
5/5
Approx. Price
$149.97
View on Amazon
View on Oral-B
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 2
Brush Name
Oral-B iO Series 9
Oral-B iO Series 9 Electric Toothbrush with 3 Replacement Brush Heads, White Alabaster
Best tech
Main Differences
Color display / 16 zone tracking / 7 cleaning modes / In the case charging
Electric Teeth Rating
5/5
Approx. Price
$283.99
View on Amazon
View on Oral-B
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 2

Key Differences

The following table lists the key similarities and differences between each series.

Series 3Series 4Series 5Series 6Series 7Series 8Series 9Series 10
Oral-B iO3 BoxOral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 7Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 8Oral-B iO Series 6Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 9Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 10Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 11Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 12
ReviewiO3 ReviewiO4 ReviewiO5 ReviewiO6 ReviewiO7 ReviewiO8 ReviewiO9 ReviewiO10 Review
Recommended Retail Price (RRP)$79.99$99.99$119.99$149.99$199.99$249.99$299.99$399.99
Number of Cleaning Modes34555677
Interactive DisplayXXXBlack & WhiteBlack & WhiteColorColorColor
Cleaning Mode Icons/LabelsXXYesOn displayOn displayOn displayOn displayOn display
Real-Time Zone Tracking with AIX
(No Bluetooth)
XYes – 6 zonesYes – 6 zonesYes – 6 zonesYes – 6 zonesYes – 3D teeth tracking – 16 zonesYes – 3D teeth tracking – 16 zones
Brush Head Replacement ReminderLight on handleLight on handleLight on handleOn displayOn displayOn displayOn displayOn display
Travel CaseXYesYesYesYesYesYes – Power2go Charging Travel CaseYes – Power2go Charging Travel Case
Battery Life2 weeks2 weeks2 weeks2 weeks2 weeks2 weeks2 weeks2 weeks
Battery Charge FeedbackPower button LEDPower button LEDPower button LEDOn displayOn displayOn displayOn displayOn display
Charging StandStandard charger
(2 pin US / 110-130v)
Standard charger
(2 pin US / 110-130v)
Standard charger
(2 pin US / 110-130v)
Standard charger
(2 pin US / 110-130v)
Magnetic charger
(2 pin US / 100-240v)
Magnetic charger
(2 pin US / 100-240v)
Magnetic charger
(2 pin US / 100-240v)
Magnetic charger with iO sense technology
(detachable 2 pin US / 100-240v)
Noise (dB)6464646472727264
Other Key InformationTakes up to 16 hours to rechargeTakes up to 16 hours to rechargeTakes up to 16 hours to rechargeTakes up to 12 hours to rechargeTakes up to 3 hours to rechargeTakes up to 3 hours to rechargeTakes up to 3 hours to rechargeTakes up to 3 hours to recharge
Please note. Every effort is made to ensure the key differences listed are correct, but these differences are subject to change without notice. Some very subtle configuration differences and app customizations are excluded. Products and the box contents can be changed without notice and different variants can exist.

Oral-B iO brush vs brush comparisons

We are often asked which model we pick between 2 specific models. For example iO3 vs iO4. The table shows our answers.

Models ComparedOur Choice
iO Series 3 vs Series 4iO Series 3 (Amazon)
iO Series 4 vs Series 5iO Series 5 (Amazon)
iO Series 5 vs Series 6iO Series 6 (Amazon)
iO Series 6 vs Series 7iO Series 6 (Amazon)
iO Series 7 vs Series 8iO Series 7 (Amazon)
iO Series 7 vs Series 9iO Series 9 (Amazon)
iO Series 8 vs Series 9iO Series 9 (Amazon)
iO Series 9 vs Series 10iO Series 9 (Amazon)

Brush vs brush key differences

Click below for a list of the key differences between each model.

iO Series 3 (iO3) vs Series 4 (iO4)

  • The Series 3 has 3 cleaning modes (daily clean, sensitive & whitening) compared to the 4 of the Series 4 (daily clean, sensitive, super sensitive & whitening). The extra mode the iO4 has is super sensitive.
  • The iO3 does not have Bluetooth like the iO4.
  • The iO3 LED light ring color can’t be changed.
  • The iO4 comes with a travel case. The iO3 does not.
  • The Series 3 has a recommended retail price of $79.99, $20 less than the $99.99 of the Series 4.
iO Series 4 (iO4) vs Series 5 (iO5)

  • The Series 5 has 5 cleaning modes (daily clean, sensitive, super sensitive, intense & whitening) compared to the 4 of the Series 4 (daily clean, sensitive, super sensitive & whitening). The extra mode the iO5 has is intense.
  • There Series 5 has cleaning mode icons on the handle that the iO4 does not have.
  • You can change the cleaning mode on the iO5 before turning the brush on. You can’t do this on the iO4.
  • The iO5 has real-time tracking of 6 zones that the iO4 does not have.
  • The Series 4 is available in 3 colors (quite white, matte black and icy blue) compared to the 2 colors (quite white and matte black) of the Series 5.
  • The Series 4 has a recommended retail price of $99.99, $20 less than the $119.99 of the Series 5.
iO Series 5 (iO5) vs Series 6 (iO6)

  • Although both have 5 cleaning modes, they are different. The iO5 has daily clean, sensitive, super sensitive, intense and whitening, whilst the iO6 has daily clean, sensitive, intense, whitening and gum care. The iO5 has super sensitive whilst the iO6 has gum care.
  • The iO5 has a brush head replacement reminder light in the cleaning mode button. The iO6 has this reminder on the display.
  • The Series 6 has a black and white display in the handle whereas the iO5 has backlit icons.
  • The Series 5 takes up to 16 hours to recharge compared to the 12 of the Series 6.
  • The Series 5 gives battery feedback via the power button icon. This is on the display with the iO6.
  • The iO Series 6 is available in 3 different colors (gray opal, black lava & pink sand) compared to the 2 colors (quite white & matte black) of the iO5.
  • The Series 5 has a recommended retail price of $119.99, $30 less than the $149.99 of the Series 6.
iO Series 6 (iO6) vs Series 7 (iO7)

  • The Series 7 comes with a magnetic charger that recharges the battery in 3 hours, compared to the standard Oral-B charger supplied with the Series 6 which takes up to 12 hours.
  • The magnetic charger with the iO7 supports 100-240v whilst the iO6 charger supports 110-130v.
  • The Series 7 comes with 2 brush heads rather than 1 of the Series 6.
  • The iO Series 6 is available in 3 different colors (gray opal, black lava & pink sand) compared to the 2 colors (white alabaster and black onyx) of the iO7.
  • The Series 6 produces up to 64 decibels of sound compared to the 72 of the iO7.
  • The Series 6 has a recommended retail price of $149.99, $50 less than the $199.99 of the Series 7.
iO Series 7 (iO7) vs Series 8 (iO8)

  • The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whitening & gum care) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whitening & gum care). The extra mode the iO8 has is super sensitive.
  • The Series 7 has a black and white interactive display compared to the color display on the Series 8.
  • The Series 7 comes with 2 brush heads compared to the 3 of the Series 8.
  • The Series 8 is available in 3 colors (black onyx, white alabaster & violet ametrine) compared to the 2 colors of the Series 7 (black onyx & white alabaster).
  • The Series 7 has a recommended retail price of $199.99, $50 less than the $249.99 of the Series 8.
iO Series 7 (iO7) vs Series 9 (iO9)

  • The Series 9 has 7 cleaning modes (daily clean, sensitive, super sensitive, intense, whitening, gum care & tongue clean) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whitening & gum care). The extra modes the iO9 has are super sensitive and tongue clean.
  • The Series 7 has a black and white interactive display compared to the color display on the Series 9.
  • The Series 9 has full 3D tracking for your cleaning performance, monitoring 16 zones rather than the 6 of the iO7.
  • The Series 7 comes with 2 brush heads compared to the 4 of the Series 9.
  • The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 7 comes with a standard travel case.
  • The Series 9 is available in 4 colors (black onyx, white alabaster, rose quartz & aqua marine) compared to the 2 colors of the Series 7 (black onyx & white alabaster).
  • The Series 7 has a recommended retail price of $199.99, $100 less than the $299.99 of the Series 9.
iO Series 8 (iO8) vs Series 9 (iO9)

  • The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whitening & gum care) compared to the 7 of the Series 9 (daily clean, sensitive, intense, whitening, gum care & tongue clean). The extra mode the iO9 has is tongue clean.
  • The Series 9 has full 3D tracking for your cleaning performance, monitoring 16 zones rather than the 6 of the iO8.
  • The Series 9 comes with 4 brush heads compared to the 3 of the Series 8.
  • The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 8 comes with a standard travel case.
  • The Series 9 is available in 4 colors (black onyx, white alabaster, rose quartz & aqua marine) compared to the 3 colors of the Series 8 ( (black onyx, white alabaster & rose ametrine).
  • The Series 8 has a recommended retail price of $249.99, $50 less than the $299.99 of the Series 9.
iO Series 9 (iO9) vs Series 10 (iO10)

  • The iO10’s magnetic charging stand has iO Sense Technology to give visual feedback (via multiple LEDs) on the brushing routine. The iO9 does not have this.
  • The iO10’s pacer is often set to 20 second (sextant) intervals compared to the 30 second (quadrant) intervals of the iO9.
  • The iO9 is available in 4 colors (black onyx, white alabaster, rose quartz & aqua marine) compared to the 2 colors of the iO10 (cosmic black & stardust white).
  • The Series 10 produces up to 64 decibels of sound compared to the 72 of the iO9.
  • The iO9 has a power adapter hardwired into the charging stand and a separate, detachable, adapter for the power2go case. The iO10 has just 1 detachable adapter for both the charging stand and power2go case.
  • The Series 9 has a recommended retail price of $300, $100 less than the $400 of the Series 10.

Detailed comparison: the main things to know about the iO range

The iO Series first launched in 2020, with the Series 7, 8 and 9. It has since evolved from 3 to 8 brushes.

The Series 3 is the entry-level model. This is the least feature rich and most affordable.

The higher the model number the more features and the more expensive it is. The range topping model is the iO Series 10.

All Oral-B iO Series toothbrushes side by side
The complete iO Series iO3 through to iO10 from left to right

They are similar in more ways than they are different

All of the models have the following features:

  • 2 minute timer
  • 30 second quadpacer (20 second sextant pacer on iO10)
  • Smart visible pressure sensor
    • Lights up red when too much pressure is applied
    • Lights up green when the correct pressure is applied
    • Lights up white when there is insufficient pressure
  • Rechargeable lithium-ion battery offering 14+ days of use between charges
  • Bluetooth technology to connect to a smartphone (the iO3 is the only exception)
  • Quieter, frictionless magnetic drive system
  • Oscillating-rotating cleaning action with micro-vibrations
  • iO-specific brush heads
  • Cleaner, more minimal design compared to other Oral-B models
Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison 13
iO Series smart pressure sensor – different LED colors and their meaning

They all clean as well as each other

Simply put, they all clean as well as each other.

All models within the iO range use the same brush motor with the same configuration.

Models like the 8 and 9 Series do have extra cleaning modes compared to the 3, 4 and 5. But, these modes don’t change the actual cleaning results.

Using the intense mode won’t necessarily remove more plaque from the teeth and gumline. You don’t need a whitening mode to make your teeth whiter — the daily clean mode can achieve this.

Your brushing time and technique have a far bigger impact on the cleaning results than the mode you use.

Man brushing teeth with Oral-B iO brush
Jon bushes teeth with iO3 that brushes as well as any other iO model

Various price points to suit different budgets

$64 is the price for the most affordable model, the iO3.

The most feature-rich brush is the iO10. It costs $320. That’s a difference of $256 for some extra cleaning modes and smart technology tracking features. Justifying this premium is very difficult.

But these prices account for the typical 20% discount on retail prices. $320 is the difference if we compare the ‘recommended retail prices’.

All brushes in the range use the same iO specific brush heads. Whether you opt for the iO3 or iO10, the long term ownership cost will be impacted most by the initial purchase price of the brush handle, not the heads.

iO3iO4iO5iO6iO7iO8iO9iO10
Recommended Retail Price (RRP)$79.99$99.99$119.99$149.99$199.99$249.99$299.99$399.99
Typical Purchase Price (approx 20% off RRP)$64$80$96$120$160$200$240$320
3 Year Ownership Cost (approx)$196$212$228$252$280$308$336$416

Of course, the table and quoted prices are just a guide. The actual selling prices vary from one retailer to another. 

As you might expect, models with extra features or increased box contents do command a premium.

The iO3 is the cheapest and has the essentials anyone needs. 

Assuming you want something a bit more capable, then the iO6 represents the best value option. It has many of the most desirable features of the iO range, including the in-handle display. But, it remains relatively affordable and you get the best of both worlds, so to speak.

Whilst the iO10 is the most technically advanced, we don’t recommend it. The only difference between the iO9 and the iO10 is the enhanced charging stand and it’s simply not worth that kind of money. 

Monochrome vs colour display of iO7 vs iO8
Black and white display of iO7 (left) vs color display of iO8 (right)

5 of the 8 variants have a display built into the brush handle.

3 of them are color, the other 2 are black and white.

Color or not, they operate in the same way and provide extra functionality. For example, you can change the handle language, change the color of the smart ring or even reset the brush.

The biggest benefit is that it makes it much easier to switch between the brushing modes or see which one you have selected.

iO3iO4iO5iO6iO7iO8iO9iO10
Interactive DisplayXXXBlack & WhiteBlack & WhiteColorColorColor

All the brushes have more cleaning modes than you need

Depending on the model you go for, you have the choice between 3, 4, 5, 6, or 7 brushing modes. 7 is the maximum number of cleaning modes available on any Oral-B brush.

I’ve yet to find anyone who uses them all or any real justification for having so many. The reality is the cleaning results between each are very similar.

For most users, 1 mode, daily clean, is more than satisfactory.

A second, lesser powered mode such as sensitive is a welcome addition for new electric toothbrush users, or those with gum disease or sensitivity.

Each of the modes use different amounts of power from the motor. This impacts the angle of oscillation at the bristle tips to create brushing patterns and effects that are different from one another.

All modes are designed to be used for 2 minutes. The only exception is tongue clean which is set for 30 seconds.

The table below shows which iO model has which mode. Should you want to learn more about each, do read our Oral-B cleaning modes explained article.

Cleaning ModesSeries 3Series 4Series 5Series 6Series 7Series 8Series 9Series 10
Number of Modes34555677
Daily CleanYesYesYesYesYesYesYesYes
SensitiveYesYesYesYesYesYesYesYes
Super SensitiveXYesYesXXYesYesYes
IntenseXXYesYesYesYesYesYes
WhiteningYesYesYesYesYesYesYesYes
Gum CareXXXYesYesYesYesYes
Tongue CleanXXXXXXYesYes

Some models don’t make it clear which cleaning mode you have selected

The iO3 and 4 do not have any labels or icons on the handle to show which mode you have selected. 

The iO5 has backlit icons, without text based names to show which mode is active. 

The Series 6, 7, 8, 9 and 10 will show an icon alongside text on the handle display.

Models that connect via Bluetooth to an app will report the active mode within the on-screen timer.

You can’t change the mode before turning the brush on with the iO3 and 4.

The iO3, 4 and 5 also don’t default to the last mode used. Therefore, if you don’t want to use the default Daily Clean mode, you have to change the mode every time you use the brush.

Oral-B iO Series 5 in the hand
Tooth icon on the iO5 represents ‘daily clean’ mode

‘Real-time tracking’ varies from one brush to another

Real-time tracking is part of the smart technology offered by the iO series. It works with the Oral-B app on your smartphone to show you a graphic image of how well you are brushing your teeth.

The iO3 has no Bluetooth connectivity and can’t be connected to the Oral-B smartphone app. Therefore it has no real-time tracking.

The iO Series 4 has Bluetooth and will connect to the app, but the functionality is limited. There is no real-time tracking — the on-screen timer that tells you how long you have brushed for is the main functionality.

The iO5 through to 10 do have real-time tracking.

However, Series 9 and 10 are the only models to offer comprehensive 16-zone tracking. The iO 5, 6, 7 and 8 only have 6 zone tracking.

iO3iO4iO5iO6iO7iO8iO9iO10
Real-Time Zone Tracking with AIXXYes – 6 zonesYes – 6 zonesYes – 6 zonesYes – 6 zonesYes – 3D teeth tracking – 16 zonesYes – 3D teeth tracking – 16 zones

The following video helps explain the differences.

Oral-B 3D Teeth Tracking (6 vs 16 zones)

There is a strong argument to suggest that the iO9 and 10’s tracking of 16 zones can encourage you to brush all your teeth better than when you track just 6 zones. But, how much difference this makes in everyday use is up for debate. To get maximum benefit from it you need to use the app every time you brush.

The 16 tracked zones are as follows:

  • Upper rear right
    • Front surface
    • Biting surface
    • Inside surface
  • Upper font
    • Front surface
    • Inside surface
  • Upper rear left
    • Front surface
    • Biting surface
    • Inside surface
  • Lower rear right
    • Front surface
    • Biting surface
    • Inside surface
  • Lower front
    • Front surface
    • Inside surface
  • Lower rear right
    • Front surface
    • Biting surface
    • Inside surface
Graphic showing the 16 tracked zones with Oral-B real-time tracking

Whereas the 6 zones tracked with the other models are:

  • Upper rear right
  • Upper front
  • Upper rear left
  • Lower rear right
  • Lower front
  • Lower rear right
Graphic showing the 6 tracked zones with Oral-B real-time tracking

When only 6 zones are tracked, you can essentially spend all the time cleaning only 1 of the surfaces within that zone and the app will still consider the zone cleaned. 

With 16 zone tracking, dotted zones sit in the center of the on-screen display. As each zone is brushed correctly, that dotted zone disappears until none remain. All the teeth on the large visualization turn white. The extra detail in the tracking can pick up on more specific, but important improvements needed in your brushing routine.

Although the iO10 has 16 zones tracking, the iO Sense stand is configured to give feedback on 6 zones. It has benefits (more on those below) and offers at a glance feedback without a smartphone, but the app provides more meaningful data.

There is no long-term data available that analyzes if apps and real-time tracking do have a beneficial impact compared to someone learning the correct brushing techniques via other means, such as plaque disclosing tablets.

iO10 in hand with smartphone app showing real-time brushing
16 zone real-time tracking available on iO Series 9 and 10

Brush head replacement reminders are implemented differently

A brush head should be replaced after about 3 months. After this, the bristles clean less effectively and are more abrasive on the teeth and gums. There may also be an increased amount of bacterial build up.

All iO models have a reminder system built into the app and the brush handle. How this reminder is displayed differs.

The iO3, 4 and iO5 have a yellow light that illuminates in the center of the cleaning mode button. The handle will vibrate too.

Those models with a display will show a notification on the screen. If connected to the Oral-B app, a notification will be displayed here too for compatible models.

Overall, brush head reminders are a feature that are nice-to-have, but not critical. If you’re organized enough you can simply use a recurring calendar reminder. The fact that they are included on each iO model means you don’t need to factor this feature too heavily into your choice of iO brush models. 

Battery life should be similar, but premium models are inconsistent

To my knowledge, all brushes have the same battery. All are claimed to last 2 weeks on a single charge.

For the most part, they do. Models like the iO3 and 4 last as many as 18-20 days.

Yet, my testing found that 12 days of use is common with the iO9.

I can’t categorically say what’s causing such variance. My suspicion is the color displays. I will often see it activated as a result of vibration or movement nearby, thus drawing power from the battery. 

The iO7, 8 and 9 come with a premium magnetic charging stand

The 3, 4, 5 and 6 all come with a standard Oral-B charger. White in color, it has a protuberance on the top that fits into the base of the brush handle.

A 2 pin power adapter is hardwired into it. The adapter supports 110-130v.

Brushes take 12-16 hours to recharge when on this stand.

The iO Series 7, 8 and 9 come with a premium magnetic stand. It’s either white or black.

The 2 different charging stands used by iO brushes
Standard charger (left) vs premium magnetic charger (right)

The round charger has no protuberance. It does have a 2 pin power adapter, and supports 100-240v. It takes up to 3 hours to recharge the brushes on this stand.

Only the iO7, 8, 9 and 10 fit and will charge on this stand.

For me, the fancy charging stand isn’t too big a factor. If bathroom visuals are important to you, maybe the magnetic stand is worth paying for. Otherwise, you can get by just fine with the cheaper stand. 

iO3iO4iO5iO6iO7iO8iO9iO10
Charging StandStandard chargerStandard chargerStandard chargerStandard chargerMagnetic chargerMagnetic chargerMagnetic chargerMagnetic charger with iO sense technology
Charging TimeUp to 16 hoursUp to 16 hoursUp to 16 hoursUp to 12 hoursUp to 3 hoursUp to 3 hoursUp to 3 hoursUp to 3 hours
Supported Voltage110-130v110-130v110-130v110-130v100-240v100-240v100-240v100-240v

The iO10’s stand is a bit different 

With the iO10, you get an iO Sense charging stand, which is magnetic and charges the brush in up to 3 hours. But, there is extra tech built-in.

You have 6 LEDs and a clock on the front to help encourage even brushing and good coverage of your teeth as you brush.

The idea is you get meaningful feedback on how well you are brushing without having to refer to the smartphone application. 

It’s a nice enough feature, but it increases the cost of the brush. It’s the only difference between the iO9 and iO10 but changes the price by $80, which just isn’t worth it. 

You can get more insight into what it offers in our iO10 review.

Oral-B iO10 with iOSense Smart Charger
iO10’s charging stand gives feedback on brushing time or coverage using LEDs

The handles with displays give the best battery feedback

All the handles offer some feedback on the remaining charge, but how they do this is different.

Those with displays show a battery icon and a percentage of the remaining charge after each brushing session.

The iO3, 4 and 5 give feedback via the LED in the power button. It illuminates white most of the time. Only when the charge is around 10% or less does it pulse red.

Those that connect to the Oral-B app will show a percentage level on-screen too.

Oral-B iO Series 8 next to iO9

Only the iO9 and 10’s travel cases offer in the case charging

The vast majority of iO models come with a travel case provided in the box.

The case will protect the brush handle from damage and accidental activation, whilst also protecting up to 2 brush heads.

The iO3 is the main exception though. No case comes supplied with the standard model. But there are variants where this is supplied.

There are some more differences between the cases to be aware of too.

Oral-B iO Series 10 being charged whilst inside it's travel case
iO9 and 10 can be recharged whilst inside their travel case – requires separate power adapter

The iO9 and 10 can hold the handle and 1 brush head only. This is because you can charge the brush inside the case. There is no battery in the case to do this. Instead, you connect the supplied proprietary power adapter.

Whilst all cases are functional, those supplied with the 7, 8, 9 and 10 are higher quality — they are thicker and more durable.

iO3iO4iO5iO6iO7iO8iO9iO10
Travel CaseXYesYesYesYesYesYesYes
Brush Heads Held12222211
In Case ChargingXXXXXXYes – uses separate power adapterYes – uses separate power adapter

The iO Series handles are quieter than other Oral-B brushes

iO handles are generally quieter in use than non-iO models from Oral-B.

The majority of iO models now operate at a maximum noise level of 64 decibels. 

The 7, 8 and 9 were the first iO models to launch. They registered higher in our testing. Oral-B may have made changes since launch to reduce this and bring it in line with other iO models. We haven’t purchased these models again to check this.

No mention of noise is made in the iO 7, 8 and 9 manual, whereas it is with the others.

iO3iO4iO5iO6iO7iO8iO9iO10
Noise (dB)6464646472727264

The light ring can be changed on all models apart from the iO3

All models have a light ring that doubles up as the visible pressure sensor.

With the exception of the iO3, the color of that ring can be changed. 

You need to use the Oral-B app to change the color.

The iO6-10 does allow the color to be changed via the in-handle display. But, you have fewer color choices than if you navigate to the app.

There is some variance in the colors available

As a general rule, all models are available in black or white. Some are available in other colors too.

Oral-B offers select heads in black as well as white. Black handles are supplied with a black brush head.

White and all other colored handles usually come supplied with a white brush head.

Travel cases are usually white, except for black models.

Charging stands are always white unless you buy the Series 7, 8 or 9, where they are available in black too.

iO3iO4iO5iO6iO7iO8iO9iO10
Number of Color Choices33232342
Handle ColorsQuite White / Matte Black / Icy BlueQuite White / Matte Black / Icy BlueQuite White / Matte BlackGray Opal / Black Lava / Pink SandBlack Onyx / White AlabasterBlack Onyx / White Alabaster / Violet AmetrineBlack Onyx / White Alabaster / Rose Quartz / Aqua MarineCosmic Black / Stardust White

Conclusion: we recommend the iO6

All things considered, the differences between each model in the iO Series range are relatively subtle.

No one toothbrush is going to result in dramatically better cleaning results.

All of these brushes offer more than what you need.

The iO6 is the best value model.

The iO3 is the most affordable and the iO9 has all the tech.

iO models command a price premium, particularly when you factor in replacement brush heads. You don’t need a premium model to clean your teeth well.
The Oral-B Smart 1500 does a decent job for a fraction of the price! All things considered, we rate it as the best electric toothbrush and it’s worth considering unless you’re set on particular features from the iO range.

About Jon Love

Jon is a leading voice on electric toothbrushes and has been quoted by mainstream media publications for his opinions and expertise. Having handled & tested hundreds of products there really is very little he does not know about them. Passionate about business and helping others, Jon has been involved in various online enterprises since the early 2000s. After spending 12 years in consumer technology, it was in 2014 that he focused his attention on dental health, having experienced first-hand the challenge of choosing a new toothbrush.

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38 thoughts on “Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 Comparison”

  1. There is one difference between the models that you have not mentioned, and may be important to some buyers. The series6 is single voltage (110-130v), whereas the Series 7,8,9, are dual voltage (110-220v).
    So, if you are travelling to Europe, Asia etc, the Series 6 cannot be recharged without a step down voltage converter.
    I found this out the hard way, as there is no mention of this in any literature or Specification information.
    I spoke to Braun Oral b, and they were extremely helpful in resolving my travel issue, but I think it is still worth bringing to buyers attention if they are going on any 2 week plus trip.

    Reply
    • Hi Ian.
      Thanks for the comment and the information. You are indeed quite correct. This is a point that I have inadvertently overlooked.
      I will have the article updated very soon to reflect this.

      Reply
  2. Hi Jon, I am an avid reader not of just books…the good old ones that are hard cover or paperback, but also reviews, comparisons, things loved, problems, and blogs like yours, with all the things we buy.
    So, because I am on a limited budget I went with the IO8 series because I got it for $199 (same price as IO7) 20% off with Bed Bath Beyonds annual coupon program, any coupon will work…just not on the brush head replacements?? Not sure if it’s because they are $25 for
    2-Ultimate Cleaning….but 3 came with it so I have plenty of time and I may switch to the Sensitive Care due to receding gums from an Auto Immune Disorder since I was a child.
    I LOVE the interactive Oral B-App, I don’t mind that it shows only 6 quads vs 16 because I have always brushed well. I Love the smile/frown at the end…last night I only got half smile 😬 not sure what that was about. Also Love the Violet Ametrine color, hard black travel case-holds two brush heads, black magnetic charger, and black replacement heads that came with it. Only downsides: The Brush-heads are huge for a little mouth, I literally can’t get the brush between my cheek and teeth/gums without causing some serious pain to my gums & bleeding. I will be calling Oral-B, as I have only had it 5 days but the bleeding is better & my teeth are cleaner than they have ever felt. I have adjusted the way I clean my back teeth but it takes me much longer….like almost 4 minutes. The only other downfall is if the IO-9 has a better software program anyone who owns a IO7 or above or any IO Series should be allowed an upgrade to the 3D version, after all we are loyal customers, and spent a lot of our hard earned time and money on these brushes. The brand that failed me, hint…Diamond Clean, Rose/Pink I purchased 8/2016 was much more expensive, did less, and and the replacement heads were $10 more than Oral-B for 2-pk. Also, the whole arm moves not just the brush head/bristles like Oral-B, and the arm is so worn out that it won’t hold a charge because it’s overworking to compensate. Subsequently my gum recession has advanced and I pay to go to a speciality dentist, It also cost me A-LOT of money in dental bills for crowns, and an implant. I am excited to see how much my oral health improves, & can’t wait for my cleaning the end of April.
    Thank you for the in depth wonderful information/video and I hope all my blubbering helps some of y’all on the fence as I was, and/or on a limited budget that could use a coupon/discount…like me. Oral-B also has discounts currently on-going now as well, so do your homework and happy shopping and better dental health!

    Reply
    • Hi Kim.

      I am not sure what books you are referring to as I haven’t written any?!

      Nonetheless thanks for the kind words and sharing your feedback with the iO8. It sounds like you are already seeing the improvements, even if it is resulting in a slightly longer brushing time.

      Reply
      • Sorry Jon, I meant I am just an avid reader of everything and I like the old fashioned way of reading…hard cover books.

        My only question is do you know of a smaller sized brush head for the IO Series? I see this complaint a lot on the reviews of all the IO Series.

        Reply
    • Kristi. I am afraid there is no place where these discounts are always applied, but they do drop from time to time. Over the last year the prices have remained higher than anticipated. Be sure to find the price you are happy to pay.

      Reply
  3. I’m having Oral B Triumph professional care 5000 for the last 10 years, I guess. Has changed battery 4 times. In general it still provides good performance, but I don’t have other experience 🙂 Now I’m thinking switch it to iO 7. Will I notice any difference? What do you think Electric Teeth?

    Reply
    • I do think you will notice a bit of difference in the clean. It will likely feel a little more powerful. But fundamentally it isn’t going to clean the teeth any better.
      If the 5000 is still working, I would be inclined to stick with it. The brush heads are more cost effective for a start.

      Reply
  4. Can the carrying pouch that comes with the iO 7G accommodate both the brush handle and the small plastic case that holds the two brush heads? Is there room enough in it also for the charger? If space in a suitcase or backpack is a premium and the difference in cost between the 7 and the 9 is not a factor, would it make sense to choose the 7?

    Thanks,
    Peter

    Reply
    • If memory serves me correctly, the pouch case will hold the handle, heads (in their own case) and the charger.
      From an overall space point of view, I don’t believe there is really a great deal in it between the case for the Series 7 and 9. I haven’t done the maths.
      If space saving is the absolute priority here, it might be worth considering other products. But that comes with a whole host of other challenges. In short, the better toothbrushes still have bulkier cases.

      Reply
  5. Is it safe to say that the motor and battery are better on the series 9 over the 7?? If it’s the same then I agree with your assessment of the 7 being the better deal BUT if the motor and battery are better than I would def opt for the series 9.

    Reply
  6. Jon,

    Good morning.
    Really appreciate your details and explanation.
    I am going to buy from Amazon.
    Please confirm the country of origin.

    Oral-B iO Series 9 Electric Toothbrush with 4 Oral-B iO Replacement Brush Heads, Black Onyx, 1 Count : Amazon.ca: Everything Else

    Have a good day
    Terry

    Reply
    • Hi Tery.

      As far as I am aware, the handle and brush heads are made in Germany. The charger and travel case is made in China.

      This is subject to change, but it is the information taken from the box of the iO9 I purchased.

      Reply
  7. Costco sells the 2 pack of the Oral-B iO series 7c for $199 when they put it on sale and the Oral-B Genius 2 pack (no model line specified but I think it’s the ​Genius 8000) for $99 when they put it on sale. Would you spend double the price for the Oral-B iO series 7c?

    Reply
    • Sam.

      No, as a general rule I would probably not spend twice the price.

      However, if it is the Genius 8000 that they offer the way it tracks your cleaning with the app is quite different. You have to use the camera on the front of your smartphone to track the position, rather than the sensors in the handle. This is quite frustrating for many, making the implementation on the iO much more appealing because it is so much more user friendly.

      If it is the Genius X that offer in that bundle, then I would go for that because the Genius X has the sensor built into the handle like the iO.

      Reply
      • Thanks. Even though I work in IT, I definitely don’t want to use my smartphone camera to track the position. I emailed Oral-B (Procter & Gamble) to ask them which Genius model is sold by Costco. On the Costco page it says “Bluetooth connectivity with real time feedback to improve cleaning habits” with a picture of a smartphone. Older reviews on the Costco page say it’s the Genius 6000 but it has 6 brushing modes not 5 like the Genius 6000 and one of the more recent reviews says this: As of 10/2020 the handle model is type 3765, which includes smartphone camera-based position detection and tongue cleaning mode. While the manual calls it the “Genius Pro 6000”, as far as I can tell it is the same handle as the Genius Pro 8000/9600 (USA).

        One more question. Which one has softer brush heads? Maybe it doesn’t matter because it has the pressure sensor.

        I’m not sure if I’m allowed to include links in my comment but here’s the link to it and maybe you can confirm which model it looks like to you.
        https://www.costco.com/oral-b-genius-rechargeable-toothbrush,-2-pack.product.100568726.html

        Thanks again.

        Reply
        • Hi Sam.

          Well Costco/Oral-B are not making this easy to really understand.

          Sometimes Oral-B will do special packages and enable extra modes etc as a bit of an exclusive deal.

          I was inclined to think that it is the Genius 6000 with an extra mode.

          Yes, the 6000 connects to the phone and provides some feedback, but not real-time tracking to show which teeth have and have not been brushed.

          This technology has been reserved for the Genius 8000/9600/X and iO.

          Based on the number of reviews that mention the camera it would imply it is a version of the Genius Pro 8000/9600 which uses the front facing camera on your smartphone to track the position of the toothbrush.

          I am more inclined to trust the reviews than the Costco listing itself. Although it would be good to have clarification.

          If you don’t want to track your brushing, why not consider the Oral-B Smart Clean 360. Perhaps not technically quite as good value, but a solid brush. It is based on the Smart 1500 that we rate as our top pick for the USA.

          I hope that helps.

          Reply
          • Thanks again Jon. I’m also inclined to trust the reviews as well.

            I originally wanted the iO series 7 because Consumer Reports here in the US gave it a top rating but it is expensive for an electric toothbrush. But then I saw the Genius X also got an excellent review on CR and saw that the Costco version of the Genius was going on sale this month so I started to consider that one. I’ll take a look at the Smart Clean 360 as well. The features that are most important to me are the pressure sensor and timer. I also want to factor in the price of the replacement heads because that will add up over time.

            On a side note, many electronics manufacturers produce special models for warehouse clubs like Costco or simply change the model number slightly so that the major retailers don’t have price match to the warehouse club prices. For example Costco’s iO series 7 model is the 7c and was $199 for the 2 pack which is much cheaper than other retailers for a single pack.

            Reply
            • Thanks for sharing Sam.

              Yes indeed these manufacturers come up with lots of clever approaches don’t they!

              Oral-B have some of the more cost effective brush heads, compared to the likes of Sonicare for example.

              I think the Smart Clean 360 will be a great option. It has the timer, pacer & pressure sensor.

              Whatever you decide upon, please do let me know which you pick and what you think of it once you have used it.

              Reply
              • Thanks again Jon. One last question. Do the Oral-B Smart, Smart Clean and Genius toothbrushes all use the same toothbrush heads? I know the iO series use a different head.

                Reply
                  • Thanks Jon. Here’s what Oral-B (Procter & Gamble) told me in response to my question about the Costco Genius model.

                    This model is the same series as the Genius 6000 (3765). The only difference between these models (6000, 8000, & 9600) are the amount of speeds, accessories included, etc.

                    After looking at the Genius 6000 reviews on Amazon, I could see that some reviewers mentioned the camera functionality so it appears to have it. I was thinking the Costco Genius model was similar to the 8000 because of the 6 cleaning modes but maybe it’s just a version of the 6000 with 6 cleaning modes.

                    Reply
                    • Thanks Sam for sharing the reply from Oral-B. This is interesting.

                      I have clearly overlooked this part of the Genius 6000! It is very poorly communicated by Oral-B if it has this tech built in. Why not include some sort of phone holder? Without it you will have to hold the phone in front of your face really steady to track the position.

                      Not making it easy for customers are they!!

  8. I just bought the oi series 7 for my 15 and 17 year old boys which both have braces so I was looking to see if I could buy the different brush attachments such as the one for braces and if it’s interchangeable or do I have to but brushes that are specific to the oi 7…? Thank you

    Reply
    • Hi Renee.

      Oral-B makes only 2 styles of brush head for the Oral-B iO. These are called the Ultimate Clean and Gentle Care heads. Both will work with braces.

      All other brush heads Oral-B offers are not compatible with the iO. They have a different fitting.

      Oral-B does make an ‘Ortho’ brush head for braces, but this is not compatible with the iO.

      The Ultimate Clean and Gentle Care heads should still provide a great clean to the teeth and braces of your sons. You don’t need a specific brush head.

      Reply
  9. I saw a 2 pack series 7 at Sam’s club today for $146.00 so I bought it. Your review helps as I wasn’t sure about my purchase. Hopefully, I will like it.

    Reply
  10. Thanks for the detailed review – it made the decision to buy the right brush for my husband easy – especially the various comparisons !! the travel charger feature in hte series 9 is great for my husband but with Covid he is not traveling….so perhaps the other option is not too bad and the extra $50or 100 is not justified

    Reply
  11. Thanks Jon. Very informative.
    I like the fact you are highlighting the omission of simple USB charging. That alone would be £100 worth more to me as a frequent traveller.
    The different modes are somewhat a hoax. The reality is, you just use the standard mode all the time in the end.
    For me what makes this toothbrush interesting is the fact you can fast charge it, a more compact design and its quieter. Thanks again

    Reply
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