Philips Sonicare DiamondClean Smart HX9924/44 review
Test score %
The Philips Sonicare DiamondClean Smart HX9924/44 is the most expensive electric toothbrush we've ever tested, but you get loads of features, such as smartphone compatibility and extra brushing modes. Can this smart electric toothbrush clean your teeth a lot better than less expensive models or is it a waste of money? Find out in our full review.
- Pros and cons
- What is it?
- What's it great at?
- Is there anything I should watch out for?
- Is there anything else I should know?
- Should I buy it?
Make smarter choices
- 55%Lowest score
- 75%Average score
- 87%Highest score
How to buy the best electric toothbrush
Experts at Which? offer advice to help you find the best electric toothbrush to suit your budget and your needs. Find out about different types of electric toothbrush, top features to look out for, and how much to spend.
Electric toothbrush brush heads explained
Which? electric toothbrush experts explain everything you need to know about the range of brush heads available from Oral-B and Philips Sonicare. Find out how CrossAction, DiamondClean, ProResults and Trizone heads differ.
Which? Best Buy electric toothbrushes
Looking for an electric toothbrush that's great at cleaning your teeth and has a battery that will hold its charge well? Which? reveals the best electric toothbrushes to buy, including brushes that cost less than £40.