In physics, acceleration is the rate of change of velocity per unit of time, and gravity the force that attracts a body toward the center of the earth or toward any other physical body having mass.

AccDataRec is an application that records accelerometer data (x, y, z components) in m/s^2 (SI unit) to the device's memory storage. When the data capture finishes, written data is in TSV (tab-separated values) format, saved with a user specified filename and consisting of: "counter \t timestamp \t x \t y \t z \t filename \n". Periodically, acceleration data is written to avoid data loss.