This is the companion app for Jolly Logic's AltimeterThree, a tiny recording altimeter for hobby model flyers. AltimeterThree can record the altitude and acceleration of quadcopters, planes, rockets, kites, hunting falcons, gliders, and helicopters. Essentially anything that flies.

This app connects via Bluetooth to AltimeterThree to control it from up to 100 feet away. Press Record in the app, and the altimeter uses its highly-accurate sensors to begin recording the flight, even when it flies out of Bluetooth range.