Philips Sonicare DiamondClean Smart Electric Toothbrush with App - Blue - HX9957/51

Item # L9734229

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Our Price


As Advertised

Reg. $349.99

In Stock

37 Items available for In Stock


The DiamondClean Smart is our best toothbrush, for complete care. Four high performance brush heads let you focus on all areas of your oral health, and our Smart Sensor technology gives you personalized feedback and coaching.

Say goodbye to plaque

Click on the Premium plaque control brush head to experience our deepest clean. With soft flexible sides, the bristles contour to the shape of each tooth's surface to provide 4x more surface contact*** and remove up to 10x more plaque from hard-to-reach areas*.

TongueCare+ tongue brush

Click on the TongueCare+ tongue brush to gently remove odor causing bacteria from the pores of your tongue. Its 240 specially designed MicroBristles get between all your tongue's ridges and grooves to remove bacteria and debris that lead to bad breath. Team with our antibacterial BreathRx tongue spray for superior cleaning and super fresh breath

Easy does it

With an electric toothbrush, you let the brush do the work. We've built a scrubbing sensor into your handle as a gentle reminder to reduce scrubbing. This way, you can improve your technique and get a gentler, more effective clean.

Care for your gums

Click on the Premium Gum Care brush head to improve your gum health. Its smaller size and targeted gum line bristles deliver gentle yet effective cleaning along the gum line, where gum disease starts. It's clinically proven to deliver up to 100% less gum inflammation* and up to 7x healthier gums in just two weeks.*

Focus areas and goal-setting

Any trouble areas your dentist has pointed out? We'll highlight them on your in-app 3D mouth map, and remind you to pay extra attention to these areas.

Smart brush head mode pairing
Thanks to a microchip in the brush head, your DiamondClean Smart will automatically select the optimal brushing mode and intensity level, so all you have to do is to press the power button.

Whiter teeth, fast
Click on the Premium White brush head to remove surface stains and reveal your whitest smile. With its densely packed central stain removal bristles, it's clinically proven to remove up to 100% more stains in just three days.**

Never miss a spot
Thanks to our smart location sensor, you'll always know where you've brushed, and where you haven't. Real-time tracking on the Philips Sonicare app that lets you know when you've achieved a thorough clean, and coaches you to be a better, more mindful brusher.

Smart replacement reminders
Brush heads wear-out over time and become less effective at removing plaque. Our smart brush recognition technology, tracks your usage and pressure and give you a personalized reminder through the light on the handle, you'll never lose track of when to replace your brush head, so you get the best in plaque removal every day. You can also monitor the lifetime of your brush heads in the Philips Sonicare app and even order replacements so you're never caught short.

  • Bluetooth® wireless technology: Connected brushing app


  • Android compatibility: Android phones, Bluetooth 4.0 enabled tablets. **PHILLIPS CELLULAR PHONE PICTURED, IS NOT INCLUDED
  • iOS compatibility: iPad 3rd Gen or higher, iPhone 4S or higher, with iOS7 or higher.
  • Battery Type

    Lithium ION

  • Box Contents

    Handles: 1 DiamondClean Smart
    Brush heads:
    3 Premium Plaque Control
    2 Premium Gum Care brush heads
    2 Premium White brush heads
    1 TongueCare+ tongue brush
    Glass charger: 1
    Travel case: USB charging travel case

  • Brand Description


  • Colour


  • Model


  • Number Of Included Brushes


  • Number Of Oscillations

    Up to 31,000 brush strokes/min

  • Rechargeable


  • Timer

    BrushPacer and Smartimer