Philips Sonicare DiamondClean Smart

Sonic electric toothbrush with app

HX9901/14
  • Personalised coaching
  • Smart brush head sensors
  • Smart brush head recognition
  • 4 modes, 3 intensities
£ 249.99
Out of Stock
Arrives within 3-4 working days
Remove up to 100% more stains** in just 3 days

Remove up to 100% more stains** in just 3 days

Click on the W3 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.**

Guides your brushing and highlights missed areas

Guides your brushing and highlights missed areas

The Philips Sonicare app lets you know when you've achieved a thorough clean and coaches you to be a better, more mindful brusher.

Takes you back to any missed spots for 100% coverage

Takes you back to any missed spots for 100% coverage

If you happen to miss a spot while brushing your teeth, your app's TouchUp feature will show you. You can then go back for a second pass, and be confident you are getting a complete clean, every time.

Make sure you're getting the most from your brush head

Make sure you're getting the most from your brush head

Brush heads wear out over time and become less effective at removing plaque. With smart brush head recognition you'll never lose track of when to replace your brush head. Your toothbrush tracks how long and hard you've brushed with each brush head, and will alert you when it's time to replace. 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.

Start taking better care of your trouble areas

Start taking better care of your trouble areas

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.

Alerts you if you're pressing too hard

Alerts you if you're pressing too hard

You might not notice when you brush too hard, but your DiamondClean Smart will. If you use too much pressure, the light ring on the end of your handle will flash. This is a gentle reminder to ease off the pressure and let your brush head do the work. 7 out of 10 people found that this feature helped them to become a better brusher.

Guides you to reduce your scrubbing

Guides you to reduce your scrubbing

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.

Brush heads automatically select the optimal settings

Brush heads automatically select the optimal settings

Wondering which mode and intensity you should use? Wonder no longer. A microchip in your brush head tells your DiamondClean Smart which one you're using. So if you click on a gum-care brush head, for example, your toothbrush knows to select the optimal mode and intensity to provide gentle yet effective care for your gums. All you need to do is to press the power button.

Choose from 4 modes and 3 intensity settings

Choose from 4 modes and 3 intensity settings

With DiamondClean Smart you get the full works. Our 3 intensity settings let you boost your clean and our 4 modes cover all your brushing needs; Clean mode for exceptional daily cleaning, White+ to remove stains, Deep Clean+ for an invigorating deep clean, and Gum Health to gently clean along your gum line.

Product Update
Support Period Philips will provide the necessary security updates until 31 December 2026.
Connectivity
Bluetooth® wireless technology Connected brushing app
Power
Voltage 110-220 V
Technical specifications
Operating time (full to empty) 14 days******
Battery Rechargeable
Battery type Lithium ION
Design and finishing
Colour Black
Service
Warranty 2-year limited warranty
Compatibility
Android compatibility Android phones
Bluetooth 4.0-enabled tablets
iOS compatibility iPad 3rd Gen or higher
iPhone 4S or higher
with iOS7 or higher
Ease of use
Handle compatibility Easy click-on brush heads
Handle Slim ergonomic design
Battery indicator Illuminated icon indicates battery life
Display Illuminated display
Brush head recognition Syncs with optimal mode
Replacement reminder To always ensure best results
reminder icon lights up
Items included
Brush heads 1 W3 Premium White
Handle 1 DiamondClean Smart
Glass charger 1
Charger base 1
Cleaning performance
Health benefits Helps improve gum health
Speed Up to 62,000 brush movements/min
Whitening benefits Removes 100% more stains*
Timer BrushPacer and SmarTimer
Pressure feedback Ring lights up in purple
Vibrates handle to alert user
TouchUp Ensures 100% coverage
Modes
3 intensities Low
Medium
High
Clean For exceptional everyday cleaning
Deep Clean+ For an invigorating deep clean
Gum Health Special attention to molars
White+ To remove surface stains
BrushSync Mode Pairing
C3 Premium Plaque Control Pairs with Clean mode
G3 Premium Gum Care brush head Pairs with Gum Health mode
W3 Premium White brush head Pairs with White+ mode
Smart sensor technology
Pressure sensor Alerts when brushing too hard
Location sensor Tracks and improves coverage
Scrubbing sensor Guides to reduce scrubbing
3D mouth map Highlights trouble areas
TouchUp To address missed spots
Software Support
Software updates Philips offers relevant software updates for a period of 2 years after the date of purchase.