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

#96 in

Electric Toothbrushes

according to Reddit Icon Reddit

Sentiment score33% positive
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Last updated: Jun 9, 2026

Reddit Reviews

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
3 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.

3 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 IconIntimatepunch
6 months ago

Suri. Built to last, cheap, quiet, ergonomic, and with a 40+ day battery life. Outlasted my multiple SoniCares which kept breaking, and still going strong today.

Reddit IconAggressive_Bus293
6 months ago

I actually disagree with the other comment and prefer the oral B. I have both and I’ve been using the sonicaire for about a month now. They both are great but oral B feels more gentle. The sonicaire is pretty intense and since it’s larger I think there is slightly more potential to incorrectly clean the gums, causing damage.

6 months ago

Yeah it’s definitely a personal preference thing! I can understand why some people prefer the usual brush head of the sonicaire because it feels more familiar.

5 months ago

Yeah why does my oral B get moldy and my sonicaire doesn’t? Also an RDH. 😂

7 months ago

I prefer Oral B to my Sonicaire. Look up BASS brushing technique on YouTube but also there are videos how to specifically brush with an electric because you do not need to use a scrubbing motion.

4 months ago

I prefer the oral B iO. Oral B brush head is better in general when used properly imo especially in the back. The only thing I do prefer about the sonicaire is they don’t get that mold issue that oral B has not figured out yet. I just have to frequently remove and clean out the brush head area on the oral B.

Reddit IconAnnab990
4 months ago

I use and love the Aquasonic Vibe. I paid about $35 for it. It comes with 8 replacement heads, a travel case, 4 cleaning modes, and warranty. It also times your brushing in 30 second increments for each part of your mouth. The replacement heads are $30 for 8 but I won't need to buy more for a long time (the company says it is 2 years worth that comes with the toothbrush initially) so i thought that was do able. I finally bought mine after my best friend bought his last year and recommended. I wish I would've have gotten one sooner. I personally like it better than my Phillips Sonicare and I used that thing for the last 15 years.

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