Android apps.
 

I have looked for a while. I wanted to find an app that uses the accelerometer in my smartphone to measure some performance. 0 to 40, 40 to 0 (since 60 is a bit hard to hit without a big hill).

The idea is to have some sort of solid consistent baseline for any change I make to have a measurable performance change, good or bad.
I have one called aLapHD:
https://play.google.com/store/apps/d..._result#?t=W10.
that would actually record a video and should some details, but I haven't had an opportunity to use it yet. I even thought about getting the paid version, but it seems there is no support, like the creator has given up.

I recall a performance app specifically for scooters, but you would need to have a shifty, not a CVT.
https://play.google.com/store/apps/d..._result#?t=W10.

Of course pretty much anything I find that may have a possibility does 0 to 60.

Does anybody have something they have used?