Philips Sonicare

Series 7900 Advanced Whitening Sonic electric toothbrush with app (HX9631/17)

Philips Sonicare Series 7900 Advanced Whitening Sonic electric toothbrush with app (HX9631/17)

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Overall

#171 in

Electric Toothbrushes

according to Reddit Icon Reddit

Sentiment score33% positive
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Last updated: Jun 30, 2026

Reddit Reviews

Reddit IconCrisdus
about 2 months ago

I have a sonicare (7300 I believe) and love it but the oral-b ii system are the best there are, if you go io3 or up.

Reddit IconSheCaughtFiRE-
4 months ago

I'm going against the grain to say Sonicare. I have both brushes. The design of the IO brush head has a small hole under the bristles where spit and toothpaste accumulates. Despite taking my brush head off and rinsing after every use, it quickly molds on the inside. It could be that I live in a humid environment (indoors usually 40%), but the mold is so gross. If you don't remove and clean it after every use it can mold even quicker. I love the feeling of the IO brush otherwise, but am sticking with Sonicare for everyday use.

Reddit Iconanonbumblebee
4 months ago

Every sonicard that I've bought has broken down within 2 years. They are good but definitely not BIFL.

Reddit Iconthe_real_snurre
10 months ago

My Sonicare with travel case (with integrated charger) is by far the best electric toothbrush I have ever used. Came here to say this.

10 months ago

Not bulky, no. And the built in charger is a blessing.

Reddit IconFresh-Computer-6994
3 months ago

I will not deinfluence you. Mas okay ang Philips Electric Toothbrush Sonic series. There are some published studies na better ang mentioned brand na yun. Dentists also agree when it comes sa clean function and bristles shape.

Reddit IconAnomuumi
4 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.

4 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.

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Rankings by Use Case

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