The Featherweight Interface app connects any of your Bluetooth-enabled Featherweight Altimeters products to your phone. For the Blue Raven flight computer, use your phone to see live sensor data, set up deployment conditions, download and review recorded flight data, and more! For the Featherweight GPS tracker, your phone points to your rocket and provides all the rocket position, velocity, link quality and tracker health data you would want at your fingertips. Live map feature plots the ground station and tracker locations to plan your recovery.