DO NOT USE Plays a loud alarm tone repeatedly after it's been running for a couple of minutes and cannot be turned off. This is apparently to draw your attention to the advert htat pops up at the same time.
When writing after purchasing the no advertising version the "free GPS timeout" occurs after a few minutes. This also sets off an alarm that the phone must be reset to turn off. Not usable to collect accelerometer data over an long time period.
Simple but useful It would be nice to have a note pop up when the accelerometer is not working. That way I know the cause of no data.
Good app to test and play with accelerometer. You can see live streaming of data. You can record and send the data to your email and so on. Helped me getting started with sensor application.
Time steps dt are uneven. Might be problematic to use for engineering purposes.
This app will let you convert short periods of accelerometer data to a csv file. It works well
Root Mean Square (RMS) calculation added.