Quick Summary
The Philips Sonicare DiamondClean Smart 9400 is an electric toothbrush for adults that combines sonic brushing with app guidance, pressure sensing, brush head detection, 4 brushing modes and 3 intensity levels. It is described as a personalised toothbrush for people who want a more guided daily routine and practical feedback while brushing.
Who It Is Best For
This toothbrush suits adults who want more control over their routine and prefer a toothbrush that can give feedback while they brush. It is also a good fit for anyone who likes to adjust their brushing style with different modes and intensity levels, or who wants to connect to an app for personalised guidance.
What To Know Before You Buy
The handle includes a light ring that flashes if you use too much pressure, which may help you ease off while brushing. The set includes the toothbrush, two brush heads, a charging glass and a USB charging travel case.
Pros: Multiple brushing modes and intensity levels give you more choice over how you brush.
Cons: Check that the included plug and bathroom charging setup suit your home before ordering.
Common Buyer Questions
Does it work with an app?
Yes. It connects to the Philips Sonicare app for personalised brushing guidance.
How many brushing settings does it have?
It has 4 brushing modes and 3 intensity levels.
Does it warn you about brushing too hard?
Yes. The light ring on the handle flashes if you use too much pressure.
What comes in the box?
The set includes the toothbrush, 1 A3 Premium All in One brush head, 1 G3 Premium Gum Care brush head, a charging glass and a USB charging travel case.
Is it suitable for bathroom charging in the UK?
It contains a UK 2 Pin bathroom plug for use in bathrooms.
Key Details
| Detail | What it means in use |
|---|---|
| Product type | Electric toothbrush for adults |
| Brand | Philips Sonicare |
| Model | DiamondClean Smart 9400, HX9917/89 |
| Brushing modes | 4 modes to suit different brushing preferences |
| Intensity levels | 3 levels for a more personalised brushing feel |
| App connection | Offers personalised brushing guidance through the Philips Sonicare app |
| Pressure sensor | Light ring flashes if you use too much pressure |
| Brush head detection | Helps support the right brush head use |
| Included items | Toothbrush, 2 brush heads, charging glass and USB charging travel case |
| Plug type | UK 2 Pin bathroom plug |
| Colour | Black |
Final Buying View
The Philips Sonicare DiamondClean Smart 9400 is a feature rich electric toothbrush with app guidance, pressure feedback and adjustable brushing settings. It is a strong choice if you want a more controlled and personalised brushing routine with a useful set of included accessories. If those features match what you are looking for, it is worth checking the full set details and choosing with confidence.
