Strelok. Ballistic calculator 1.1.9
the author of this app says:
Strelok is a ballistic trajectory calculator.
Small, handy and accurate. Field-proven accuracy since 2001.
Supports imperial (yards, feet, inches, etc) and metric units.
Input all parameters, push button "Calculate!" and you will have vertical and horizontal values for rifle scope correction.
Also, you can select reticle from list and see wind and distance corrections on reticle without turning knobs.