Flight speed is an advanced application that uses the phone's built-in GPS system to show flight/airplane current speed as well as the altitude/height at which airplane is flying. Application can show speed in kilometer per hour (KPH) or meter per hour (MPH). Altitude is displayed in meters above from sea level. We strive to make all readings as accurate as possible they are only as accurate as your device's GPS sensor and should only be regarded as approximations. Information displayed: 1. Current speed of Flight/Airplane in kilometer per hour or meter per second. 2. Altitude/height at which airplane is flying. Application works in Flight/Airplane mode as well.