Philips Sonicare DiamondClean Smart Sonic Electric Toothbrush with App (HX9957/51) - Lunar Blue

Model Number: HX9957/51
Web Code: 10761881


Get the complete oral care you need with the Philips Sonicare DiamondClean Smart electric toothbrush. It features Smart Sensor technology that tracks your brushing in real time and sends that data to the Sonicare app. In-app coaching helps you improve your brushing, while a tongue brush removes odour-causing bacteria to freshen breath.
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  • Connected electric toothbrush features built-in Smart Sensor technology that tracks your brushing in real time, sending the data to the Sonicare app via Bluetooth
  • Personalized in-app coaching helps improve your brushing by taking you back to any missed spots, alerting you if you press too hard, and guiding you to reduce scrubbing
  • Removes up to 10x more plaque and 100% more stains than a manual toothbrush
  • Designed to help improve your gum health with up to 7x healthier gums in 2 weeks
  • TongueCare+ tongue brush features 240 MicroBristles to gently remove odour-causing bacteria from the pores, ridges, and grooves of your tongue
  • Offers 5 modes, Clean mode for daily cleaning, White+ to remove stains, Deep Clean+ for an invigorating deep clean, Gum Health to gently clean along your gum line, and Tongue Care for cleaning your tongue
  • 3 intensity settings allow you to boost your cleaning
  • Syncs automatically with the brush head and selects the optimal mode and intensity to provide effective care so you get the most from the brush head
  • Charging glass makes it a cinch to recharge and store your toothbrush; simply place the toothbrush into the glass holder after brushing and it will start charging immediately
  • USB charging travel case included for recharging the toothbrush when you're travelling or on the go
Battery Level Indicator
Charge Time
1 h
Brushing Modes
Pressure Sensor
Indicator Bristles
In-Handle Display
Separated LCD Display
Number of Moving Heads
Replaceable Brush Heads
Brush Heads Container
Included Brush Heads
Lunar Blue
Country of Origin
23.6 cm
26 cm
11.1 cm
656 g
  • Handles: DiamondClean Smart
  • Brush Heads: 3 x Premium Plaque Control
  • 2 x Premium Gum Care Brush Heads
  • 2 x Premium White Brush Heads
  • Tonguecare+ Tongue Brush
  • Glass Charger
  • Travel Case: USB Charging Travel Case

  • Bluetooth conked out. Dealing with support
    by NPSB

    on April 27, 2019

    Toothbrush has worked well. The app is pretty useless. It seems great at first - but it never tracks all the areas of brushing well. Limited customization regarding location in mouth and angulation. Quite frustrating actually. I would have to have a mouth much larger to accommodate the angulation to get accurate alignment on the app. Hence I end up using it infrequently. I like the brush, but some hype, that is not worth the expense. A year out, and my bluetooth has conked out. Dealing with support now. Let us see how it goes. Never have I had a bluetooth conk out on any of my devices. Quite strange. Maybe a disconnect between the new IOS and the app, let's see.

    Review originally posted on

  • Great performance!
    by Simopel

    on April 2, 2019

    This is my second diamond clean toothbrush. This one has even improved. I like the features and different programs. It was a little confusing in the beginning. I don’t like the App because you have to have your phone always nearby. But the rest of it is perfect! Great design. Just a bit pricey.

    Review originally posted on

  • Cannot download the application in my country, Israel. Was a waste of money to buy a non product as advertised
    by Dror

    on January 19, 2019

    Not useable in my country Israel. Cannot download the application

    Review originally posted on

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