No just don’t need to touch the scope at all! Fire a group, take a ruler and measure the distance in cm from your zero (if you’re on paper). Go into the app and adjust, it’s really straightforward.Hi, recently purchased a Hikmicro Alpex 50EL - with regard to zeroing with the Hikmicro Sight App does the menu button on the scope still have to be pressed to freeze the frame or can it be done in the app say on an iPad. Quite difficult to not move rifle when pushing button on scope, thanks, Bill