I was playing with a Motorola G72 and noticed this feature by accident: double-tap on the back of the phone to trigger a custom action.
Here is a video showing this feature
This is not the same as double tapping the fingerprint scanner. This phone has a front-facing under-display scanner.
It’s very neat and handy, I hope other phones implement this too.
Update: See this comment for a link to an app that enables the feature on many phones.
chop chop flashlight is the very best feature of the Moto series
For real. I moved over to Samsung a while back and I miss choppy choppy light light.
It’s been six years since I switched from an X2 to a pixel 2 and I still miss the flashlight chop
Wow! I bet most iPhone users don’t know this exists. This is more like a usability feature than an accessibility one. It even supports triple tap!
Pixel phones also have this feature, called quick tap. Quite handy to turn on and off flashlight for example.
Reading the comments, it looks like there are lots of other phones doing this.
Personally I use it to turn on the flashlight on my Pixel 6.
The Pixel series have this. It’s called Quick Tap.
Combined with Tasker, you can make it do anything – if the existing options aren’t enough.