Philips Sonicare

DiamondClean Smart (HX9924/36)

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Overall

#95 in

Electric Toothbrushes

according to Reddit Icon Reddit

Sentiment score56% positive
5
1
3
Last updated: Apr 29, 2026

Reddit Reviews

Reddit IconNancy6651
3 months ago

I've been using Sonicare toothbrushes forever. I usually get the package of 2 of them, in case I can convince my husband to use one (unsuccessful so far) or for travel. I like the one I have now since it has more "intelligence" and lets me know when to replace the brush head.

Reddit IconWTYBrown
6 months ago

Diamond care. Nothing comes close.

6 months ago

Have you tried the Diamond care? Compare it to all the other models out there and again, there's nothing that even comes close.

Reddit Iconponytrack
11 months ago

Bought the highest end sonicare set three times. One of the two always developed really loud buzzing sounds. Theoretically it could be fixed, but I opted to return and replace. After using sonicare for 15 years, what back to oral b. Design isn’t as slick, but works great and was way cheaper. We’ll see what my dentist says in six months.

Reddit IconAnomuumi
about 2 months ago

Another Sonicare user here. My teeth are definitely cleaner since I switched from a rotary brush to this. I know it's anecdotal evidence, but I can feel the difference every day.

about 2 months ago

I'm mostly moving it and not applying a lot of pressure. I think in the user guide it said to use a ~45 degree angle, but I need to check. I have a higher-end Sonicare, but afaik it's the same speed of 62k brush movements/min as the one in the picture. It could be that my rotary brush was shit, but it did have a new brush. I definitely feel that my teeth are better brushed and stay also cleaner longer when I started brushing with Sonicare.

Reddit Icon0nesanctum
5 months ago

I had the Philips Diamondcare, it was fun for a bit. Nifty app and timer that helped me develop better habits, but then it died. Got them to replace it, and the next one died after a year. Instead of buying another I went with the cheapest Philip that had a timer. A tooth brush that has a 2 minute timer is good by me. Probably won’t go back to diamondcare…

Reddit Iconlumixjourney
2 months ago

I had one of the old diamondclean models and it stopped working so i ordered a new diamondclean model from philips which was useless - i ended up buying the older model from aliexpress and it worked perfectly

Reddit Iconwolfhavensf
3 months ago

I use the Philips diamondcare. Although on the expensive side it has great individual settings for things like gum health and whitening and a built in timer.

Reddit Iconjimmyjackearl
about 2 months ago

I have travel size Philips Sonicare with built in usbc charging. No cavities in 5+ years.

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