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Oral-B iO Series 9 Review

A rotating-head brush for those who like an easy-to-use device with some bells and whistles
Oral-B iO Series 9
Credit: Oral-B
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Price:   $300 List | $299.94 at Amazon
Pros:  Pressure sensor, several modes
Cons:  Expensive, messy, misses 'craggy' molars
Manufacturer:   Oral-B
By Ben Applebaum-Bauch ⋅ Review Editor  ⋅  Jan 6, 2022
Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more
53
OVERALL
SCORE


RANKED
#10 of 11
  • Comfort - 40% 5.0
  • Cleaning - 30% 6.0
  • Ease of Use - 20% 6.0
  • Battery Life - 10% 3.0

Our Verdict

The Oral-B iO Series 9 is an app-enabled electric toothbrush with several different settings for a wide range of brushers. The full-color screen is easy to read, and pairing it with the Oral-B app provides useful insight into your brushing habits. It is comfortable to hold and to use. The circular brush head cups tooth surfaces and the angled bristle pattern helps clean spaces between teeth. Despite its many settings, we weren't blown away by its cleaning capacity. Its battery life is toward the low end of the spectrum, but we still found it to be totally sufficient, even for week-long travel. This toothbrush is great for those who are looking for versatility and like the idea of having personalized data to make the most of their brushing routine.

Compare to Similar Products

 
Oral-B iO Series 9
This Product
Oral-B iO Series 9
Awards  Editors' Choice Award Editors' Choice Award Best Buy Award Best Buy Award 
Price $300 List
$299.94 at Amazon
$70 List
$49.95 at Amazon
$70 List
$74.95 at Amazon
$30 List$50 List
$49.94 at Amazon
Overall Score Sort Icon
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Pros Pressure sensor, several modesVery easy to use, solid battery life, great cleaning powerExceptional battery life, comfortableInexpensive, great battery lifeGood cleaning performance, easy to use
Cons Expensive, messy, misses 'craggy' molarsOnly a single cleaning modeNot the best at cleaningLimited features, not the best cleaning performanceNot the most comfortable, subpar battery life
Bottom Line A rotating-head brush for those who like an easy-to-use device with some bells and whistlesAn excellent all-around toothbrush that cleans well and is particularly easy to useA solid, all-around toothbrush with an outstanding battery life and excellent cleaning capabilitiesIt provides average overall performance, an excellent battery life, and a great priceThis great budget brush cleans well but can be a bit aggressive on sensitive gums
Rating Categories Oral-B iO Series 9 Philips Sonicare Pr... Brio SmartClean Sonic Fairywill D7 Sonic Oral-B Pro 1000
Comfort (40%)
5.0
6.0
6.0
6.0
4.0
Cleaning (30%)
6.0
7.0
7.0
7.0
8.0
Ease of Use (20%)
6.0
8.0
5.0
5.0
9.0
Battery Life (10%)
3.0
7.0
10.0
9.0
3.0
Specs Oral-B iO Series 9 Philips Sonicare Pr... Brio SmartClean Sonic Fairywill D7 Sonic Oral-B Pro 1000
Charger info 100 - 240V a.c.
50/60Hz
100 - 240V a.c.
50/60Hz
0.4 - 1.4W
100 - 240VA
50-60Hz
0.9 - 1.3W
N/A 110 - 130V 50/60Hz / 0.9W
Estimated annual brush head cost $75 $50 $26 $12 $48
Waterproof/resistant Can use in shower Can use in shower Yes, up to 1 meter up to 30 min Yes, up to 1 meter up to 30 min Can use in shower
Number of different brush heads 1 8 3 2 9
Measured battery life 10 days 28 days 70 days 50 days 11 days
Number of brushing modes 7 modes: daily Clean, whitening, gum care, sensitive, intense, super sensitive, and tongue clean 1 clean 5 modes: clean, white, polish, massage, sensitive 5 modes: white, clean, sensitive, polish, massage 1 daily clean
Pressure sensor Yes Yes No No Yes
Thirty second reminder Yes Yes Yes Yes Yes
Two minute alert Yes Yes Yes Yes Yes
Travel case included Yes No No Yes No
Weight 4.6 oz 4.3 oz 4 oz 2.6 oz 4.5 oz
App Yes No No No No

Our Analysis and Test Results

The Oral-B iO Series 9 embraces technology and pairs with your smartphone via Bluetooth to give you real-time insights into your brushing habits. With seven different brushings modes, it offers a setting for almost everyone, from those with sensitive gums, to people who want an intense oral hygiene experience.

Performance Comparison


Oral-B iO Series 9 electric toothbrush - the io series 9 is a sleek and feature-filled brush.
The iO Series 9 is a sleek and feature-filled brush.
Credit: Ben Applebaum-Bauch

Comfort


This brush is comfortable to use. With seven different modes, there is something for everyone. From super sensitive to intense, gum care to tongue clean, each setting has a different intensity and rotation pattern to meet the diverse needs of a wide array of brushers. The handle feels a little heavy in the hand but is comfortable to grip.

Oral-B iO Series 9 electric toothbrush - the embedded screen gives positive feedback for good brushing habits.
The embedded screen gives positive feedback for good brushing habits.
Credit: Ben Applebaum-Bauch

Our testers found that even the most intense setting was not too powerful. The brush head stem is thicker than average so it is better suited for people with larger mouths.

Cleaning


We were somewhat underwhelmed by the cleaning power of the iO Series 9. The rounded head is good for getting around the sides of molar surfaces, but we found that it struggled a little more in the chewing-surface crevices. There are seven different cleaning modes, but our testers didn't notice a huge difference between the strength of the strongest and most gentle settings.

Oral-B iO Series 9 electric toothbrush - the rounded brush head and angled bristle clusters do a nice job of...
The rounded brush head and angled bristle clusters do a nice job of covering rounded molar surfaces.
Credit: Ben Applebaum-Bauch

We do really appreciate the pressure sensor that turns the brush's LED light red when the user is pressing too firmly. The two-minute timer helps hold the brusher accountable for a complete cleaning session and the 30-second pulse intervals facilitate spending an equal amount of time in each quadrant of the mouth. The big benefit of this brush is its smartphone compatibility. Downloading the Oral-B app and pairing the brush with your phone provides insight into brushing patterns. Users receive a score for each session and a 3D model of a mouth highlights areas that were well-cleaned and ones that need a little extra attention.

Oral-B iO Series 9 electric toothbrush - using the brush in tandem with the app provides useful insights...
Using the brush in tandem with the app provides useful insights about where the user is doing well and where they need to focus more attention.
Credit: Ben Applebaum-Bauch

Ease of Use


The digital onboard screen and rubber buttons make the brush easy to use. This model welcomes you with a 'good morning' and a sunshine graphic when you pick it up first thing. From there, it's just a matter of pressing the power button to turn it on.

Oral-B iO Series 9 electric toothbrush - the screen provides easy-to-read information about settings and...
The screen provides easy-to-read information about settings and displays total brush time.
Credit: Ben Applebaum-Bauch

The user can press the second, bottom button to cycle through the different brush modes or change the color of the LED ring light. One downside that we discovered very quickly, is that the included brush heads have multiple holes that, over the course of a session, accumulate toothpaste that then seeps out, often making for a messy experience.

Oral-B iO Series 9 electric toothbrush - the included travel case is really convenient for carrying the brush...
The included travel case is really convenient for carrying the brush in a suitecase.
Credit: Ben Applebaum-Bauch

Battery Life


We found the battery life to be totally sufficient. It lasted 10 days on one charge. Though this is on the lower end for the category, it still delivered throughout a battery cycle without losing intensity. It also works well for traveling up to a week if you don't want to toat around the charger.

Oral-B iO Series 9 electric toothbrush - a battery indicator screen tells the user when it's time to charge up.
A battery indicator screen tells the user when it's time to charge up.
Credit: Ben Applebaum-Bauch

The device also includes a continuous battery charge indicator on the screen so you can see its charge level down to the percent. The LED light around the neck also glows red when the battery level is low.

Oral-B iO Series 9 electric toothbrush - the charging base is low-profile and the brush just rests on top of...
The charging base is low-profile and the brush just rests on top of it.
Credit: Ben Applebaum-Bauch

Value


For the price point, we think there is better value to be had elsewhere. The primary benefit of the brush is the extra tech that comes included. If data collection is your thing, then this model and the associated app can definitely give you that. However, the cleaning capability is not as robust as we would expect for a brush with this pricetag.

Conclusion


The Oral-B iO Series 9 is a good model for improving brushing habits and provides a good-enough clean, but doesn't make it into the top tier. We like the travel case, and various features make it easy to use and provide versatility if multiple people are using the same handle.

Oral-B iO Series 9 electric toothbrush
Credit: Ben Applebaum-Bauch

Ben Applebaum-Bauch

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