The Aviation Calculator, by ASD, is a simplified mobile version of the full blown Aviation Calculator that comes with the PDToolKit Procedure Design Suite for the design of ICAO and FAA flight procedures.

This mobile version covers tools like:

Air Speed and Distance Calculation
RNAV (Basic GNSS, DME/DME, VOR/DME)
Minimum Distance between Waypoints Calculator
Earliest/Latest distance Calculator
Track Distance (TRD) Calculator
Obstacle Clearance Height (OCH) Calculator
Wind Spiral Tool
DME Tolerance Tool
Unit Conversions
Gradient Conversions/Calculations

ASD tools are used in the development and design of flight procedures using either the ICAO PANS-OPS or FAA TERPS criteria; these IFPP design tools cover conventional through to PBN (RNP AR, etc. ).