Our recommendations are independently selected and dentist-approved. We may earn a commission if you buy something. Why trust us?

Oral-B iO Series 7 vs Series 8 vs Series 9

Oral-B iO Series Comparison Header Image

Which one would we choose?

Our choice: Oral-B iO Series 9
2nd choice: Oral-B iO Series 7

The iO Series 7 is the brush to go for based on features and price alone if I base this comparison on the recommended selling price of $199.99.

The Series 9 is the top of the line model and will be more widely sold and promoted. However, it commands a $100 premium.

For that extra $100 the benefits are a couple of extra brush heads in the box, a travel case that allows you to charge the toothbrush whilst inside and 2 extra cleaning modes.

This therefore is not a justifiable premium in my mind over the Series 7.

But, the reality is that it is very likely that the iO Series 9 will actually sell for much less than its retail price and I suspect will actually sell on average around $220-240, thus making it a potentially justifiable premium for the extras it offers.

Our Choice
Oral-B iO Series 9 Electric Toothbrush with 4 Replacement Brush Heads, White Alabaster
Oral-B iO Series 8 Electric Toothbrush With 3 Replacement Brush Heads, White Alabaster
Oral-B iO Series 7 Electric Toothbrush with 2 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 9
Oral-B iO Series 8
Oral-B iO Series 7
Customer Rating
Electric Teeth Rating
5/5
5/5
5/5
Price
$299.99
$191.99
$192.99
Prime
Our Choice
Oral-B iO Series 9 Electric Toothbrush with 4 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 9
Customer Rating
Electric Teeth Rating
5/5
Price
$299.99
Prime
Oral-B iO Series 8 Electric Toothbrush With 3 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 8
Customer Rating
Electric Teeth Rating
5/5
Price
$191.99
Prime
Oral-B iO Series 7 Electric Toothbrush with 2 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 7
Customer Rating
Electric Teeth Rating
5/5
Price
$192.99
Prime

Video Comparison

Oral-B iO Series 7 vs 8 vs 9

Key Differences

The following table lists the key differences between each series only.

If a feature is not listed, then it should be assumed that all 3 series have the feature. For example, all 3 have an OLED display and a built-in timer and pressure sensor.

Series 7Series 8Series 9
Oral-B iO Series 7 vs Series 8 vs Series 9 1Oral-B iO Series 7 vs Series 8 vs Series 9 2Oral-B iO Series 7 vs Series 8 vs Series 9 3
Recommended Retail Price (RRP)$199.99$249.99$299.99
Handle Color(s)Onyx Black
(IO7 M7.2B2.2B BK)
White Alabaster
(IO7 M7.2A1.1B WT)
Onyx Black
(IO8 M8.3B2.2B BK)
White Alabaster
(IO8 M8.3A1.1B WT)
Violet Ametrine
(IO8 M8.3B2.2B VT)
Onyx Black
(IO9 M9.4B2.2A BK)
White Alabaster
(IO9 M9.4B2.2A BK)
Rose Quartz
(IO9 M9.4A1.1A RQ)
Number of Cleaning Modes567
Daily Clean YesYesYes
SensitiveYesYesYes
Super Sensitive XYesYes
IntenseYesYesYes
WhitenYesYesYes
Gum CareYesYesYes
Tongue CleanXXYes
Interactive DisplayBlack & WhiteColorColor
Artificial IntelligenceYesYesYes
3D Clean TrackingXXYes
Travel CaseYesYesYes – Power2go Charging Travel Case
Number of Brush Heads Included234
Box Contents – Oral-B iO Toothbrush Handle
– 2 x iO Ultimate Clean Brush Heads
– 1 x Travel Case
– 1 x Magnetic Charging Stand
– Oral-B iO Toothbrush Handle
– 3 x iO Ultimate Clean Brush Heads
– 1 x Travel Case
– 1 x Magnetic Charging Stand
– Oral-B iO Toothbrush Handle
– 4 x iO Ultimate Clean Brush Heads
– 1 x Power2go Charging Travel Case
1 x Travel Case Power Adapter
– 1 x Magnetic Charging Stand

iO Series 7 vs Series 8

  • The Series 7 has a recommended retail price of $199.99, $50 less than the $249.99 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 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten & gum care) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whiten & gum care).
  • 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.

iO Series 8 vs Series 9

  • The Series 8 has a recommended retail price of $249.99, $50 less than the $299.99 of the Series 9.
  • Both models are available in black onyx and white alabaster color options. The 9 Series is available in rose quartz color also whereas the 8 Series is available in violet ametrine instead.
  • The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten & gum care) compared to the 7 of the Series 9 (daily clean, sensitive, intense, whiten, gum care & tongue clean).
  • The Series 9 has full 3D tracking for your cleaning performance that the Series 8 does not.
  • 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.

iO Series 7 vs Series 9

  • The Series 7 has a recommended retail price of $199.99, $100 less than the $299.99 of the Series 9.
  • The Series 9 is available in 3 colors (black onyx, white alabaster & rose quartz) compared to the 2 colors of the Series 7 (black onyx & white alabaster).
  • The Series 9 has 7 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten, gum care & tongue clean) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whiten & gum care).
  • 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 that the Series 7 does not.
  • 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.

These differences are explained at length later in this article. However, you might wish to learn more about each brush being compared. To do so, check out our hands-on reviews:

Please note. Every effort is made to ensure the key differences listed are correct, but these differences are subject to change without notice. Products and the box contents can be changed without notice and different variants can exist.

Oral-B iO Series 9 in White Alabaster

Detailed comparison: what’s the difference between the Oral-B iO Series 7, Series 8 and iO Series 9?

The number of differences between the Oral-B iO 7, 8 and 9 Series is not as significant as you might expect.

Technically there are more similarities than there are differences. Here is a list of ways in which all 3 series of the iO are the same. All of the models have:

  • Built-in timer (2 minutes)
  • Built-in pacer (30 seconds/quadrants)
  • Built-In pressure sensor – lit red when pressure is too great, green when it is just right
  • Rechargeable lithium-ion battery offering 14+ days of use between charges
  • Bluetooth technology to connect to a smartphone
  • AI technology to track the location of the toothbrush in the mouth
  • Frictionless magnetic drive system
  • Oscillating-rotating cleaning action with micro-vibrations
  • Magnetic charging stand
  • Quick charging – in around 3 hours
  • Interactive OLED display to provide real-time feedback and encouragement
  • Travel case to at least store and protect the handle and 1 brush head

It is primarily the box contents, number of cleaning modes and price that differs.

The top of the line Series 9 comes with 7 cleaning modes, whilst the 8 comes with 6 and the 7 comes with 5.

The modes and which model has what are listed in the following table.

ModesSeries 7Series 8Series 9
Number567
Daily CleanYesYesYes
SensitiveYesYesYes
Super SensitiveXYesYes
IntenseYesYesYes
WhitenYesYesYes
Gum CareYesYesYes
Tongue CleanXXYes

The different cleaning modes are far from essential and not needed. The extra modes have slightly different cleaning times and settings which may make them more suitable or practical for some.

Just because the Series 7 does not have a tongue clean mode that would last for 20 seconds on the Series 9, does not mean you can’t brush the tongue with the Series 7. You would just need to use a different mode.

The lack of additional modes does not ultimately have any bearing on the cleaning results.

To learn more about the differences, do read our Oral-B cleaning modes explained article.

Oral-B iO Brushing Modes

All 3 of the variants have an interactive OLED display, however where the 8 and 9 series have a color display, with the series 7 it is black and white.

Where the iO Series 9 stands out over the other models is the inclusion of the 3D tracking. All have the AI to work out the position of the toothbrush in the mouth, but only the Series 9 offers a 3D representation of this within the feedback that the brush and app offers. Essentially, the top of the line model makes it easier to visualize where you are doing things right and wrong.

The number of brush heads included in the box with each model differs.

The 7 comes with 2, the 8 comes with 3 brush heads and the 9 comes with 4 brush heads.

All models use the iO Ultimate Clean brush heads.

All models come in both a black onyx and white alabaster color option.

With the Series 8 and 9, there is the choice of a third color.

That choice is violet ametrine in the Series 8 and rose quartz with the Series 9.

The difference here is the color of the toothbrush handle only.

With the black onyx models, the handle, heads, charging stand, travel case and power adapter are all black in color.

With the white alabaster the handle, heads, charging stand, travel case and power adapter are all white in color.

When it comes to the rose quartz and violet ametrine variants, the handles are either color, but all the accessories are white.

Oral-B iO 9 Series Colored Handles

With the Series 7 and 8 the travel case holds the brush handle and up to 2 brush heads. However, the travel case with the 9 Series holds the brush handle and just 1 brush head.

However, the 9 Series has an extra feature not available on the 7 and 8.

Called ‘power2go’ the travel case with the 9 Series allows the iO to be recharged whilst sat inside.

The toothbrush is charged via a detachable power adapter.

The brush cannot recharge without the power adapter being connected.

The power adapter is proprietary to Oral-B products. It does not use the more desirable USB Type-C charging.

Oral-B iO Series 9 Onxy Black Box

All of these differences have a knock on impact on the price. There is a $100 difference in the recommended price of the 7 Series compared to the 9 Series. $199.99 compared to $299.99.

The Series 8 is in the middle at $249.99

These differences are because of the perceived value Oral-B places on the additional box contents and features each model offers.

Does one clean better than the other?

No, simply put they all clean as well as each other.

Yes, the 8 and 9 Series does have extra modes compared to the 7, but these modes don’t necessarily alter the actual cleaning results.

Instead the modes alter a users experience and comfort with the toothbrush.

There argument to suggest a toothbrush that suits a users needs or wants better can result in a better clean of the teeth. But, the evidence for this, particularly clinical data is basically non existant.

For many years Oral-B and other brands have offered multiple cleaning modes on electric toothbrushes and I have yet to say any meaningful data to suggest these extra modes pay dividends for the majority of users.

Oral-B iO Ultimate Clean Brush Head Professional Clean

Is one better priced than the other?

Yes, the Oral-B iO Series 7 is the best value at $199.99.

The 8 Series commands a $50 premium and the 9 Series a $100.

Yes, the 8 and 9 do offer a fraction more in the box as well as extra cleaning modes, but the ‘extras’ don’t really add up to the real world price difference.

The logical and most sensible purchase is the Series 7. However, the likely selling price of the 9 Series is likely to be more heavily discounted, in the region of 20-25% and as such it will likely sell for $220-240 making the additional brush heads and power2go charging travel case worth the extra spend.

Please note that all prices quoted are approximates and will vary based on location, supplier and time of purchase.  These figures were correct at the time of writing and should not be relied upon as hard fact, but used as a guide during your decision process.

Conclusion

The differences between each model in the iO Series is relatively subtle.

As you will have seen it easily becomes confusing as to know which variant is best to buy.

All of these brushes offer more than what you need.

You do not need to spend as much as this or find a toothbrush with as many features as the iO Series to clean your teeth well.

The Sonicare ProtectiveClean 4100 and the Oral-B Pro 1000 do a decent job for a fraction of the price!

That said, the iO marks a major design change in the Oral-B line up of products and is considerably quieter.

On paper alone, the iO Series 7 is the most sensible purchase based on what you get for the price. With a $100 premium price for the 9 Series, it is not the sensible choice for the limited differences.

However, the reality is that the actual selling price, not the recommended, will be such that the Series 9 will be the logical buy because the price premium over the 7 Series will be justifiable.

Our Choice
Oral-B iO Series 9 Electric Toothbrush with 4 Replacement Brush Heads, White Alabaster
Oral-B iO Series 8 Electric Toothbrush With 3 Replacement Brush Heads, White Alabaster
Oral-B iO Series 7 Electric Toothbrush with 2 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 9
Oral-B iO Series 8
Oral-B iO Series 7
Customer Rating
Electric Teeth Rating
5/5
5/5
5/5
Price
$299.99
$191.99
$192.99
Prime
Our Choice
Oral-B iO Series 9 Electric Toothbrush with 4 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 9
Customer Rating
Electric Teeth Rating
5/5
Price
$299.99
Prime
Oral-B iO Series 8 Electric Toothbrush With 3 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 8
Customer Rating
Electric Teeth Rating
5/5
Price
$191.99
Prime
Oral-B iO Series 7 Electric Toothbrush with 2 Replacement Brush Heads, White Alabaster
Brush Name
Oral-B iO Series 7
Customer Rating
Electric Teeth Rating
5/5
Price
$192.99
Prime

Your Opinions

Do you own or have you used the Oral-B iO Series?

Are there certain features that you really like or dislike?

Let us know what you think about this brush and let others who may well be considering purchasing one know your opinions before they do.

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.

Read More

Leave a comment or question

22 thoughts on “Oral-B iO Series 7 vs Series 8 vs Series 9”

  1. 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!!

  2. 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
  3. 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
  4. 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
  5. Thanks Jon. Very informative.
    I like the fact you are highlighting the omission of simple USB charging. That alone would be Β£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
Leave a comment