TruAirspeed
- A true airspeed calculator for the iPhone and iPad. While many true airspeed calculators are available in the App Store, this app is unique in that the pressure altitude is not a required input; instead, the indicated altitude and altimeter pressure (Kollsman) setting are input. It also corrects for compressibility effects (but not shock waves), and allows correction of pitot-static system /airspeed indicator error. Outputs are true airspeed, mach number, pressure altitude and density altitude. Units may be English or metric.
Version 1.2, which is compatible with iOS 9.3 and later, is available for free in the App Store.