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Philips Sonicare 9900 DiamondClean Prestige HX9992/42 - Electric Toothbrush

Reviews Philips Sonicare 9900 DiamondClean Prestige HX9992/42

Interested in reviews of Philips Sonicare 9900 DiamondClean Prestige HX9992/42? It got 4.7 out of 5 stars from our customers. Find specific customer reviews of Philips Sonicare 9900 DiamondClean Prestige HX9992/42 below. We will appreciate if you also share your experiences with Philips Sonicare 9900 DiamondClean Prestige HX9992/42 after purchasing.
361.90 €
In stock > 5 pcs
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User Reviews

Hana, Brno 37flag
Rated 30/03/2026, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase - review from a price comparison website
Perfect cleaning, connection with the app works without problems, beautiful design.
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Jiří, Prahaflag
Rated 24/11/2025, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
lighter and smaller than the previous model I had in this series. very easy to use and one-time setup via the app as well.
the charging stand is unstable. The charging cup of the previous series suited me much better and fortunately it is also usable with this model.
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Anonymous customerflag
Rated 28/08/2025, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
For me, a very big disappointment. We had toothbrushes almost 7 years old, also Philips Sonicare. I figured I'd pay extra and get "the best". Rather, it's a step (if not several steps) backwards from the "old" ones. The old ones had 3 diodes indicating battery charge. One knew at first glance. Nothing here. One diode. The old ones had mode switching. Nothing here. All through the app. Basic things like modes and battery I would like even without the app. As for the noise level, I wanted to change the brushes because the original ones seemed "already" noisy. Compared to these, they're quiet. The body of the toothbrush does not have a hole at the bottom, so it does not fit into the charging case that we have with the UV sanitiser. Charging case disaster. It opens in the bag when you run or put the bag on the ground. The head can only be there without the cover. Charging is also not indicated in any way. I would have expected a pointer as well. We are trying to give the brushes a chance, but the longer I use them, the more I "miss" the old quality ones. About the only plus is the heads, but they fit the old ones too, so I could have bought the heads and been happy. I don't even comment on the connections and cleaning indicators in the app. That doesn't work as much as it works. I'd like to switch modes, but the toothbrush won't connect.
perhaps the only plus are the heads, but they come separately on the older ones.
They look nice, but that's useless to me considering the cons: )
worse than 6 years old models
noisy compared to the old ones
no charge indicators
a useless case. Opens, no indication of toothbrush charge, head only without cover
switching modes only via the app
the connection doesn't work rather than works
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Tomáš, Praha 8 - Kobylisyflag
Rated 09/05/2025, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
I'm a bit disappointed that the OralB iO 10 is honestly a better equipped device and in some ways better thought out. I used to have a cheap OralB, but after that experience I chose Philips for two reasons: there are no stupid holes in the head of the toothbrush where saliva flows into and it can't be cleaned, and secondly because brushing is not just about physically scraping your teeth as I used to think. Philips suits me better.
I find sonic cleaning better than just "scraping" with OralB, and I honestly feel better about the cleaning.
BASIC: no holes in the brush head where saliva flows and stinks
On the outside, the toothbrush gives a better impression than the OralB iO 10
Background app sync. it doesn't sync, I don't know why. I have to do it by hand.
The app is pretty slow
Replacement heads are not cheap no
Compared to OralB iO 10 less equipped (display, clock puck)
Switching between modes requires an app
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Nezávislý odborový svaz Policie České republiky, Praha 1 - Staré Městoflag
Rated 19/12/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
Cleans teeth beautifully
Fast when charging
Gorgeous and practical workmanship
Mobile app super
Price
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Anonymous customerflag
Rated 04/12/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
Nice look
Good features
Fast charging
Price
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Anonymous customerflag
Rated 04/12/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
I am overall very satisfied. Huge difference against the Oral-B I had before.
It's working as it should.
Cleans perfectly
Battery life
Transport case
Overall design
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Jiřina, Praha 6 - Řepyflag
Rated 18/11/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
I can't rate it any further it is a gift
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Jan, Světlá Horaflag
Rated 14/11/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
You can do better with quality models from other brands
Cleans well
The toothbrush can be charged via the travel case with a usb-c cable
Preset programs are unnecessary in my opinion
Turning off features like "pressure check" requires a complicated online search
Wireless charging is far from the price of the product....
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Jiří, Místekflag
Rated 12/11/2024, variant Philips Sonicare 9900 DiamondClean Prestige HX9992/42
Verified purchase
cleans well
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