Here is an algorithm to detect a fall using an accelerometer. Try that with App Inventor to detect a fall. You can code the AI blocks.
Here is an app that can be used to determine if the Android moves during a 30 second period using the accellerator.
The sensitivity set for x and y acceleration (0.4 and -0.4) works with the hardware in my Android 8.1 tablet. With these settings, if the Android doesn't move (sitting on a desk perhaps); it says so. If the app is on my chest and I am not breathing, it shows no movement. As soon as I stop holding my breathe, it knows I am breathing (well that my body is moving) providing the Tablet is on my chest and not in my hand. Will this work with your device? I don't know. I hope so. If it doesn't vary the 0.4 to higher or lower values and see what works.
AccelerometerTimed .aia (5.0 KB)
Regards,
Steve