Oral-B iO Series 9

The writer finds the iO9 a very good cleaner loaded with useful technology, but considers it pricey and only worthwhile for users who will fully exploit the app and tracking.

The writer found the Series 9 a top-tier electric toothbrush with excellent cleaning, long battery life, and a useful travel case, fully recommending it for anyone who can afford its high price despite minor design annoyances.

The writer finds the iO Series 9 a top-tier performer with fun, useful brushing feedback, but considers it expensive and notes that cheaper iO models deliver similar cleaning, with the OLED screen and smart features being the main extras and battery life being a weakness.

4.5/5

A quiet, effective brush that cleans thoroughly and coaches better technique through pressure feedback and an optional app, held back mainly by its high price and costly replacement heads.

After seven months of twice-daily use, the writer found the iO Series 9 a slim, stylish, long-lasting smart brush whose pressure sensing and feedback fixed her heavy-handed brushing, making the high price feel justified.

The writer considers it the best electric toothbrush they have tested, thanks to its powerful, quiet and comfortable cleaning and useful display, with the very high price and weak app tracking as the main drawbacks.

8/10

The writer found the iO Series 9 to be the best-cleaning toothbrush they have used, with a sturdy build and helpful pressure feedback, and recommends it despite its very high price, heavy battery drain, and fairly ordinary smart tracking.

The iO9 is a superb, great-looking cleaner that is one of the best electric toothbrushes available, but its gimmicky tooth tracking, messy head design and very high launch price hold it back, making it much easier to recommend when discounted.