Easy Calibration is an app for quickly and easily calibrating every standard optics for rifles.
You just have to set the distance for your calibration, and optionally the inclination of the rifle.
After the first shot, measure the distance between the center of the target and the hole. Using the metal ring on your optics you can compensate the shot for the distance and the incline by one or more "click". The value of each "click" is a fraction of the MOA (minute of angle) calculated by the app: it depends from your optics and it is suggested by the app.
Knowing the measure of a MOA ad a certain distance is also useful to quantificate and standardize your shooting precision.
The app is very lightweight and it doesn't use much of the smartphone resources.
Thanks to Easyicon and Freepik for the beautiful icon :)