Reader supported. We may earn a commission on recommendations.

Published: February 10, 2024

Philips Sonicare DiamondClean 9900 Prestige review

Author: Jon Love (9 Comments)
Philips Sonicare DiamondClean 9900 Prestige review 1

The best Sonicare toothbrush: what you need & lots more

star star star star star

It cleans the teeth well, looks great and feels premium in the hand. It has the essential features you need.

It also has lots of extra technology including real-time tracking and personalized feedback. It can help you brush your teeth better and improve your oral care habits if you are committed.

The DiamondClean Prestige 9900 is the best smart toothbrush on the market today.

Philips Sonicare DiamondClean 9900 Prestige
Philips Sonicare DiamondClean 9900 Prestige
Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2




Premium look & feel


Pressure sensitive buttons


Reminds you when to replace your brush head


You have to use the app to change the cleaning mode


Bluetooth technology works well


Bluetooth connectivity isn’t essential & adds to the cost


Stylish & compact charging travel case


No space to store the USB cable

You can get the same cleaning results for far less money

The Prestige commands a real premium, which we find hard to justify when you don’t need the extra features.

As such, the 4100 Series is a great option, but you forgo the ‘smart’ features.

The DiamondClean Smart from Sonicare strikes a bit more of a balance. Similar to the Prestige, it is quite a bit cheaper.

Philips Sonicare DiamondClean Smart 9750
Philips Sonicare DiamondClean Smart 9750
Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2 Philips Sonicare DiamondClean 9900 Prestige review 2

Real-time tracking encourages you to brush better

With Bluetooth technology, the Prestige 9900 is what I would classify as a ‘smart’ toothbrush. It is able to connect to iOS or Android devices and allows different data points to be presented visually within the free Sonicare application.

Clear at a glance insight into your oral care habits is the goal. You then learn, adapt and improve long term.

As a general rule, we don’t recommend smart brushes. You can clean your teeth just as well without one, they use more resources and are usually more expensive.

Philips Sonicare DiamondClean 9900 Prestige review 12
Midnight blue Sonicare DiamondClean Prestige 9900.

A strict brushing pattern has to be followed

The 9900 goes beyond tracking basics like brushing time and pressure, it knows the exact position of the brush in the mouth. This means you can respond quickly and perfect your brushing technique.

As you clean your teeth in the order the app specifies, the on-screen teeth in each of the 6 zones change to white. Come 2 minutes, if all teeth are not white, you will see where you are going wrong and what areas need more attention.

At the end of the session, you are presented with mouth maps that make it easy to understand how well you have done. These are visuals that show which areas of the teeth have been brushed or missed. They are also used to show pressure and scrubbing. I think Philips could make these feel more meaningful by giving a percentage score.

Philips Sonicare DiamondClean 9900 Prestige review 13
Mouth map of the pressure applied during a cleaning cycle.

If you don’t follow the guidance exactly, your tracking data may be inaccurate. You could be brushing the upper right teeth when it wants you to brush the upper left. Although the sensors can detect this, it won’t show the upper right teeth as having been brushed. 

Brands like Oral-B don’t enforce such a routine. They rely on the sensors to track areas. This is appealing as it is less strict but it doesn’t promote the same consistency. Good oral care habits are built on repetition.

You don’t have to use the app in real time. You can brush, in a pattern you desire and then allow the data the handle records to sync after.

Tracking accuracy is better than most, but not perfect

Sensors in the Prestige are able to detect if you are brushing the inner or outer surfaces of your teeth. The app doesn’t currently show or monitor the brushing of the biting surfaces. Competitors like the iO Series 9 do.

As a result, Oral-B is tracking 16 zones whereas Philips is tracking just 12. In the scheme of things it isn’t a big issue, but Oral-B can theoretically give more specific feedback and insight because it's reporting on more areas.

Philips Sonicare DiamondClean 9900 Prestige review 14
Post brushing feedback showing perfect coverage. If areas were missed, yellow teeth would be shown.

The accuracy of the tracking is pretty good and better than most. Yet it is not perfect all of the time. There will on occasion be a delay in the onscreen visuals updating to show the area being brushed.

It can mean you brush for longer or your brushing experience feels a little less fluid as you move from one zone to another. It’s a frustration but doesn’t necessarily make you want to stop real-time brushing. Given the price tag you might expect faultless tracking. No competing brands outperform here. In fact, many are worse. 

The app is well thought out with useful information, but there’s scope for improvement 

The app provides too much information for most users.

If you are obsessed with your teeth, it has pretty much everything you could want. You can go back and review individual brushing sessions logged by day, month and year. 

For the less obsessed, the dashboard gives a good overview, highlighting key trends and averages.

Clear visuals and bold use of color make it easy to see some of the highs and lows in your brushing routine. Green is good, orange areas require improvement.

Philips Sonicare DiamondClean 9900 Prestige review 15
Detailed in app graphics show recorded brushing data.

Generalized tips and advice are given, with some more personalized ones too. Your data is compared to the average behaviors of others in a way that generally motivates.

The app has lots of other features including shopping for replacement bristles, logging your dental appointments, tracking brush head usage and showing the handles remaining battery power.

Additional customization options include setting specific focus areas to work on and enabling or disabling certain features. Oral-B goes a bit further giving more control over brushing time, pacing and more. But that doesn’t mean you should opt for Oral-B instead.

I  would like to see the option of not having to follow a guided routine, whilst using the app, relying on the sensors to pick up on the brushed zones.

Like most smart toothbrushes, this is designed to be used by 1 user only. If you share the handle, it doesn’t differentiate.

You need to use the app to change the cleaning mode

You’ve got the choice of 5 different cleaning modes, but you can only change them from the smartphone application. This does add a layer of inconvenience. 

It is not possible to change or even see which mode you have selected from the handle itself. There are no mode labels or LEDs on the handle at all.

Truthfully, you don’t need 5 cleaning modes on a toothbrush. White+ mode doesn’t give significantly different results to Clean mode. 

Therefore, making it harder to change modes means you focus on the main act of brushing.  But why include them and make it difficult to switch?! It’s quite the juxtaposition given this is the most feature-rich toothbrush on offer.

Your choices within the app are:

  • Clean
  • White+
  • Gum Health
  • Deep Clean
  • Sensitive

Our Sonicare cleaning modes article explains the differences between each.

Philips Sonicare DiamondClean 9900 Prestige review 16
Lots of settings, including brushing modes can be changed from the app only.

You can adjust the intensity of the cleaning action without the app

The intensity of any cleaning mode can be changed. 

This means you can make the default ‘clean’ mode feel less intense and more gentle, more like the Gum Health or Sensitive modes, without having to actually change the brushing mode.

You need to tap the intensity panel below the power button to make the change.

  • 1 light – low intensity
  • 2 lights – medium intensity
  • 3 lights – high intensity

The pressure sensitive buttons take time to get used to

To counter previous reliability issues caused by toothpaste and other gunk around the power button, Philips has implemented a seamless button design.

Philips Sonicare DiamondClean 9900 Prestige review 17

The pressure sensitive buttons take some getting used to. I can’t say I’m a big fan.

It makes for a very sleek and potentially more reliable setup, but you don’t get the reassuring feedback upon pressing as you would expect.

You have to give a really firm push to power on or off the brush, but at least this has a concave design that works with the fingertip.

Changing the brushing intensity on the other hand is more fiddly. Firm taps on the flat pressure sensitive area below the power button are required to adjust the intensity. Handle vibration and LEDs confirm a press has registered.

The USB C charging case is ideally suited to travel

Holding the handle and 1 brush head, the case is Impressively compact and durable with a reassuring magnetic closure. It lacks notable vents for airflow.

Wrapped in vegan leather and color matched to the handle, it looks very classy. The small looped strap makes it easier to hold.

Although there is no battery in the case itself, you can recharge the handle's battery by connecting the provided USB cable to the USB-C port integrated into the case. And somehow it remains lightweight.

It’s possibly the best toothbrush travel case I have ever used and an ideal companion for a regular traveler. The only possible drawback is you will need to carry the USB cable separately.

Philips Sonicare DiamondClean 9900 Prestige review 18
The Prestige’s travel case accepts USB type c cables to charge the brush whilst inside.

More features than you need, but useful nonetheless

Our dentists recommend just 3 features that they really like to see present in an electric toothbrush. They are a 2 minute timer, a pacer and a pressure sensor. The Prestige has all 3. 

Additional features primarily enhance your user experience.

The pacer might not work the way you expect

The timer automatically turns the toothbrush off at the end of a cleaning cycle, making it obvious you’ve brushed for the recommended time.

During the cycle, the brush will pause momentarily at set intervals. This changes the brushing sensation and sound and is your cue to move from one area of the teeth to another, with the intention of brushing all evenly.

Where typically brushes have 30 second pacers, the Prestige has 20 second pacing. The end goal is the same, the difference is there are 6 sections (sextants) rather than 4 (quadrants).

As you clean each section, you need to make sure you brush the front, back and top surfaces of the teeth.

Philips Sonicare DiamondClean 9900 Prestige review 19

Great cleaning results from the large and premium A3 brush head

Supplied in the box is a single A3 Premium All-in-One brush head. It is the newest of a wide array of interchangeable Sonicare brush heads compatible with the Prestige. The idea here is that this does away with the rest. 

Similarly sized to other sonic heads, the bristles are of varying lengths and angles to cup the tooth and achieve good results. Although the size may make it more difficult to move if you have a small mouth. 

It provides great cleaning results, I certainly have not been disappointed, my teeth felt lovely and clean after use.

Impressive claims have been made about how well they clean. I can’t say the results were drastically better than any other Sonicare head though.

Philips Sonicare DiamondClean 9900 Prestige review 20
The A3 all-in-one brush head replaces the need for multiple brush head styles.

As an all-in-one solution, it is gentle on the gums, I can vouch for the softer bristles. Triangular tipped bristles help buff away surface stains to whiten the teeth. It’s rubber backed so it’s soft on the teeth and cheeks.

Compared to Oral-B brushes, the cleaning action feels softer and less intense. The motor produces up to 31,000 brush strokes/62,000 movements, which is the maximum of any Sonicare brush. Technique and brushing time are more important than power, but it’s going to aid in getting the best results.

Pressure and scrubbing sensors vibrate and illuminate when activated

The pressure and scrubbing sensor help prevent you from doing unnecessary damage to your teeth and gums.

A ring of purple light will shine around the base of the handle and a different vibration will be felt in the hand when the pressure sensor is activated.

You don’t need to apply lots of force as you brush. Relieve the pressure if you get this alert.

Philips Sonicare DiamondClean 9900 Prestige review 21
A purple light signals that the pressure sensor has been activated.

If you see a ring of orange light as you brush, you’ve activated the scrubbing sensor. 

This means you're moving the brush too much. You need to reduce the movements and glide the head over the teeth more slowly. Rapid movements in any direction won’t improve the cleaning results. 

If using the app as you brush, you would be alerted here too.

As part of a wider desire to help correct poor oral care routines, Philips has enabled SenseIQ technology which looks to sense, care and adapt. A great example of how this works is if you scrub or apply pressure excessively (more than 5 seconds at a time), the brush will step in and lower the brushing intensity. This SenseIQ video explains more

Philips Sonicare DiamondClean 9900 Prestige review 22
Excessive motion in the brush head will activate the scrubbing sensor as signalled by the orange light.

Timely brush head replacement reminders

BrushSync technology built into the 9900 allows the handle to track different heads via the Radio-Frequency Identification (RFID) chip that is built into the vast majority of compatible heads.

An LED on the handle is lit and the handle vibrates when it's time to replace the bristles. There will be a notification in the app too. The light will remain lit until the head is replaced or the reminder feature is disabled. This video explains more

Using a brush head for longer than 3 months can mean that the brush head is cleaning less effectively and may even be damaging teeth and gums. 

Our own research has shown that 4 in 10 people do not change their brush head every 3 months, this is where this tech comes into play.

Such tech isn’t a reason alone to switch to this brush. But, if you have a habit of forgetting to replace bristles, it can be helpful.

Philips Sonicare DiamondClean 9900 Prestige review 23
Worn bristles clean less effectively. The Prestige 9900 alerts you when heads need replacing.

Small but meaningful touches

Philips build into their brushes a few extra features that enhance daily use. Each on their own isn’t a make-or-break feature, but they really show attention to detail.

Examples include:

  • A  beeping sound and vibration you get when placed on the charging stand to confirm the brush is now charging.
  • A confirmation sound when settings on the brush handle have been applied to the app.

It’s one of the best looking electric toothbrushes

The 9900 boasts a very clean and minimal look fitting of the premium price tag.

Available in champagne and midnight blue color options both have a matt finish and from a feature and performance point of view are identical.

Philips Sonicare DiamondClean 9900 Prestige review 24
Midnight Blue and Champagne colored DiamondClean Prestige brush handles.

About the typical weight and thickness for a toothbrush, the handle has a slightly squarer design, unlike the cylinder you might expect. It actually works well and if anything aids with the in hand grip, given the lack of textured surfaces.

It stands upright on a countertop and doesn’t tend to roll all that much when laid flat. It feels well balanced and solid in hand, like it will stand the test of time. 

Adding a seamless power button not only improves reliability but helps with the minimal look. 

Philips have perhaps focused too much on the design at the cost of usability though. The pressure sensitive buttons are a bit too firm and the intensity settings are not immediately obvious.

Water resistant, it can be used in the shower or happily rinsed off under a tap. This makes it easy to keep clean and needs only a wipe to remove more stubborn grime.

Philips Sonicare DiamondClean 9900 Prestige review 25
The 9900 is water resistant.

The battery lasts around a month on a single charge

I achieved 30 days of use from the Lithium-Ion battery sealed inside the handle, when using the clean mode and high intensity. This is double the below average 2+ weeks life suggested by Sonicare.

Different modes and brushing intensities will have a bearing on usable life, but 2 weeks is the clear minimum you should expect.

An LED on the brush handle gives at a glance feedback on the remaining charge of the battery. You can also get a more precise percentage reading from the smartphone application.

Philips Sonicare DiamondClean 9900 Prestige review 26

USB charging cables have their advantages

The 9900 can be charged in the provided travel case or on the provided charging stand.

The charging stand has a more premium design compared to a USB charger supplied with the likes of the 2100 Series. Made up of a puck and plate, the handle sits on top. There is no need to align the handle with a protuberance found on many stands.

Unlike the case, the stand has a USB cable measuring 1 meter (39 inches) hardwired into it.

Being USB has its advantages as the stand can be easily connected to multiple different power sources, from a wall outlet to a portable battery bank.

A USB to 2 pin power adapter, supporting 100-240v is included. A welcome accessory for many the inclusion goes against the environmentally considerate approach the company takes with more affordable models. Their USB charging stands don’t come with 2 pin adapters.

A full charge takes up to 16 hours, but feedback is provided via the LED.

Philips Sonicare DiamondClean 9900 Prestige review 27
Color matched travel case. One of the most compact and best toothbrush cases available.

It’s one of the most expensive sonic toothbrushes

$399.99 is the retail price of the 9900 Prestige, but thankfully 20% discount is common, thus the average purchase price is approximately $320.

Replacement brush heads cost on average $10 each, over 3 years, it will cost $430.

Expensive for a toothbrush, there is limited justification to pay this much, when other Sonicare brushes half the price clean the teeth just as well. Our top dentist recommended electric toothbrush costs about a quarter of the price.

Oral-B’s iO Series 9 is similarly featured and works out a few dollars more expensive.

If you want premium features but for less money, consider the DiamondClean Smart.

2 years support included as standard

The warranty supplied with the Prestige is an industry average 2 years. 

With years of experience behind them the likelihood of failure is low, but nobody can guarantee 100% reliability. Philips have acknowledged previous issues by implementing a new button design, based on issues with previous versions.

It would be welcomed if Philips gave another year's warranty, it would help them stand out from the competition and for the price, is a fair ask.

Environmental impact

Aside from the paper based packaging, little of the Prestige is sustainable. 

Philips even include a 2 pin USB power adapter which they exclude from more affordable models citing environmental protection. It seems the more you pay the less of a concern this potentially is.

The average electric brush is 11 times more impactful on the planet than a manual toothbrush. This only increases with the added, non-essential features present here. The exact impact we don’t know.

Easy repairability isn’t built into the brush. Trying to do this yourself will likely break it. Technically it can be completed at an authorized service center, but outside of the warranty this can pose a challenge.

Philips has partnered with schemes such as TerraCycle in some countries, to encourage recycling of consumable brush heads. Better than nothing, it’s often challenging to actually send items back.

The company still uses petroleum based plastic for the majority of heads and hasn’t implemented its own robust recycling scheme.

Conclusion: the best of Sonicare if you’re prepared to pay for it

It’s the best smart toothbrush available on the market today when you consider the features, cleaning performance and price. 

Oral-B’s iO Series 9 is comparable in many ways, but doesn’t feel as refined as the DiamondClean Prestige.

Unless you are committed to using the features and are prepared to pay for them, comparable tooth cleaning can be achieved for a fraction of the price with the likes of the 4100 Series.

Size guide

  • Toothbrush height with head - 24cm / 9.4 inches
  • Toothbrush height without head - 17.5cm / 6.9 inches
  • Width - 2.7cm / 1.1 inches
  • Depth/thickness - 2.8cm / 1.1 inches
  • Weight with head - 123g / 4.3oz
  • Weight without head - 117g / 4.1oz
  • Travel case size - 19.2cm / 7.5 inches (L) x 3.3cm / 1.3 inches (W) x 4.8cm / 1.9 inches (D)
  • Travel case weight - 110g / 3.9oz (withouth brush) or 233g / 8.2oz (with brush)
  • Package weight - 405g / 14.3oz


  • 71dB

Country of manufacture

  • China


How do I turn the Adaptive Intensity feature on and off?

This is turned on by default.

You can turn the feature off or on within the Sonicare app.

Open the Sonicare app.

On the pre-brushing screen, tap the ^ button to expand the toothbrush settings.

In the Adaptive Intensity section, tap on the blue toggle slider to switch the feature on or off. The feature is on if the white circle is over to the right. 

How do I turn the Scrubbing Feedback feature on and off?

This is turned on by default.

You can turn the feature off or on within the Sonicare app.

Open the Sonicare app.

On the pre-brushing screen, tap the ^ button to expand the toothbrush settings.

In the Scrubbing Feedback section, tap on the blue toggle slider to switch the feature on or off. The feature is on if the white circle is over to the right.

How do I change the cleaning mode?

The clean brushing mode is enabled by default.

You can change the cleaning modes from within the Sonicare app only.

Open the Sonicare app.

On the pre-brushing screen, tap the ^ button to expand the toothbrush settings.

Tap the mode box. You will see your current selected mode, and the options to choose between.

Tap on the circle next to the mode you want to change to.

When you see a check mark on the update screen, your mode has been successfully changed.

Tap the < arrow to start brushing with your new mode.


The 9900 Prestige brush spoken about in this review was provided by Philips PR department. Electric Teeth did not purchase this model. No financial reward was provided to conclude the review the way that we did. No editorial control was given.

Author: Jon Love

Related Topics

Leave a comment

November 3, 2022

Waste of money, unreliable, limited use 20 days after purchase, the handle battery is dead and cannot be charged. Replacement service is awful and absolute waste of time. During my 20 days experience with this extremely expensive toothbrush my observations are as follows: – Battery lasts for a few days and must be charged. – The tracking on the app is not precise and would be in error most of the time and would show that you covered parts that you actually did not cover and the opposite. This happens even if you go with the set direction and starting position. If you do not start from that point, it would be even worse. It is not reliable. – If you brush without the app, it will not be posted later when you connect the toothbrush to the app. So forget about brushing without the app, and synchronizing later and have all your cleans in the app for stats. – The stats in the app – extremely limited. Tips – well if you think that 3 tips that repeat all the time is usable to you, than yeah it provides you tips. I wonder what the Oral-B app looks like, as the advertised tips and stats in your review here helped a lot for my decision to go with Philips as opposed to Oral-B, and in reality the stats are very limited. You get brushing time for each part which is not even accurate, since most of the time the toothbrush does not know what part and whether back or front you are brushing and they are messed up always. You do not get the hours of the day, if you happen to brush twice in the morning, for example to cover a bit more than the 2 minutes, then even if you skip the evening, the app will show you that you brushed 2 and there is no way to see that you skipped the evening activity. – Cleaning – ok….but you get the same with a $100 toothbrush. – To change modes you need the app. – Materials – did not appear to be expensive and solid for the price, no difference to me to $100 toothbrush. The inside of the box was covered with dust – I purchased form the Philips online shop. As a conclusion – absolute waste of money. The app is of very little use, the tracking is malfunctioning all the time, stats extremely limited, battery does not last for long, quality is not reliable. I would not advise to buy this toothbrush.

Jon Love - Chief tester
November 4, 2022

Thanks for sharing your experience and feedback on the brush. It doesn't sound great and is quite different to what we have experienced during our use. With the brush failing so quickly Philips Sonicare should really be responding proactively to get this brush replaced for you. You mention the replacement service is awful. What has happened/what are they doing about it for you? If you are not having much luck you might want to consider their money back guarantee.

November 8, 2022

Jon, No such thing as Philips being proactive, I spent hours on the phone. Spoke with about 6-7 different people, 2 of them had an attitude. My experience with the replacement/refund: 1) For my case, there was no such thing as 90 days return, it is 30 days. And it is real pain. 2) I still have not received replacement/refund, and honestly I will not be surprised this nightmare to continue, so will keep you and your readers updated. First, I contacted Philips and asked for a replacement. They said they did not have midnight blue color on stock, which was my original choice, but had champagne, so I agreed on changing the color as long as I have a replacement soon. A few days later, I received an email from Encompass (which is a third party handling Philips spare parts). The email was codified, said there is an update on my order, for shipping there was a 0, for BO there was 1. ETA was for 1 week later. And this was where my journey began. Speaking with various people saying 1) No, it is not on backorder, all is normal 2) Yes, it is on backorder but will be delivered to you on the Eta date 3) Yes, it is on backorder and will be shipped on the ETA date 4) Yes, it is on backorder and on the ETA date there will be updated ETA date. The last information made me requesting a refund as opposed to a refund: the 30 days period was expiring exactly on that day, so I had to go through 2 supervisors on the phone to get this period expanded so I could get a refund. I begged them first to ship the item from the Philips shop, as there was an active promotion at that time and appeared to be in stock. No way, no flexibility at all. Your expectation for them being proactive is more like a fiction. I shipped the broken toothbrush, still to receive a refund, so I will keep you posted. Total time spent on the phone: more than 3 hours. ETA time was updated on the date it was showing first, and now ETA is 30 days later. So, the last information and me reading between the lines turned out to be correct, and If I waited for a replacement, I would have waited as a minimum 1+ month and this despite my compromise to go with a color that was not my original choice. Expecting a delivery of an Oral-B IO 9 currently and my family is done with Philips Oral care products forever.

Jon Love - Chief tester
November 9, 2022

Oh gosh this is very bad and I really feel for you reading about what has gone on. Please do keep me updated with what goes on. This feedback is valuable more than you know and can help us to guide more customers in the right direction with their purchasing decisions in the future. This really isn't a positive image for Sonicare to portray.

November 8, 2022

Oh, and I forgot something: When I confronted them, that they lied to me that there was champagne on stock, while it turned out that there wasn't, they told me that they did technically did not lie to me, as it was available in Canada. (I am US customer and nothing to do in my order with Canada). I was just speechless. And something else from my review of the toothbrush: I did not get a chance to use the travel case, but when packing the toothbrush to ship it back to Philips, I tried the travel case. The travel case will not fit the handle and the brush head together. There is a place for both of them in the case, but the travel case will not close with both of them inside. Played with this more than 10 minutes, asked my wife to try as well, in case I am missing something, she was not able either.

Matthew J Boylan
June 3, 2021

Hi Jon: I have purchased the Sonicare 9900 and used it twice a day for about two weeks before reading your review. I use the Deep Clean [3 minute] mode. My problem with 9900 is its App's visual reflection of "Coverage" [what teeth I have brushed]. It is important to note that I have the brush and app synched and that my Iphone is never more than 12 inches from the 9900. I also scrupulously follow Sonicare's instructions and the App's suggestions to start with the upper right and spend 30 seconds of the front, back and top . I then move on to the front teeth and repeat throughout the entire six segments. At the end of this: the App reflects that from half or more than half of the teeth: I have not been brushed at all. That is, the app reflects most of the teeth as yellow -and not white or brushed. I am afraid it the app coverage information is quite inaccurate [and therefore the App's information is not useful at all]. I wonder if you have any suggestions as to what I might be doing wrong - or how to obtain much more accurate information as to coverage - that is what teeth have been brushed? Note: the "scrubbing" and "pressure" indicate: always fine but given the errors on coverage I am not sure what to trust in this App.

Jon Love - Chief tester
June 3, 2021

Hi Matthew. Thanks for the feedback. Very interesting. I have not experienced this, had I, I would have made this clear. It sounds like this has been consistent since you got the brush. Have you tried resetting the handle or disconnecting the brush from the app and reconfiguring it? Have any updates come through to the app or the brush that could have had a part to play in the time you have been using it?

April 27, 2021

Thanks for the detailed review. What happens, if you brush your teeth sometimes after midnight? Does the app then give a yellow symbol, because there was only one cleaning session for the previous (but three for the current) day or is the AI smart enough?

Jon Love - Chief tester
April 28, 2021

A great question. I can't say I have tested this specifically. But as far as I am aware then yes, it will show 1 cleaning session for 1 day and then 3 for the current day. If this is a habit then occurs regularly then I am not sure how it will affect the data long term. But, if this is something that happens on occasion it should not be too much of an issue as overall the dashboard should show that things are on track or not subject to other parts of your brushing performance.

Never neglect your teeth again. Sign up to our newsletter today for honest advice and transparent reviews