Measures motion over a specified period of time.

At the desired sampling rate, the differences between the linear accelerations are summed up until you decide to stop recording.

Works even if you turn the screen off.

It will automatically detect the maximum rate your phone can sample, and you can adjust the sensitivity yourself.

There's super limited functionality, and I think I made what functionality there is, foolproof. There were originally ways to crash it because I was too lazy to include a fix for edge cases. Those weaknesses have now been resolved.

Oh, want the source code?

https://github.com/Celeria/motion-detection-simple/tree/master