Android App for Logging Acceleration
 

I'm looking for an Android phone app that can log the acceleration of my motorcycle based on GPS and/or the phone's accelerometer (i.e. without connecting to an ODB2 port.) I'd like to use it for testing changes to air fuel ratios and ignition timing at wide open throttle. I may also use it with some sort of throttle limiter to measure changes to engine efficiency at partial engine load.

It would need to measure acceleration over a custom speed range, not just 0-60 or 1/4 mile times. An option to output a log file in .csv format or something would be great, since it would allow me to plot and compare power and torque curves.

Any suggestions?