This is a ballistic calculator.
+ Function of calibration of trajectory ("Truing").
+ current weather from internet weather station
+ ability to select target type from long list of targets
+ ability to measure tilt angle with phone camera
+ ability to enter current altitude from internal GPS sensor
+ WeatherFlow wind meter holder
(4.1 and up)
KitKat (4.4 - 4.4.4),Lollipop (5.0 - 5.1.1),Marshmallow (6.0 - 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)