tapCount Fixed in any frame

tapCount = touch.tapCount;

I realized that when my game with this 30frames I get a larger amount of TapCount in my TouchButton with 60 this amount of tapCount halved ... I already tried for the code in FixedUpdate () in OnGUI () but always the amount varies with frame. Every touch this button adds a level (mylevel + = float;) The problem is that if the cell wheel 30 the amount of sum is much greater than if you turn 60, as I have set the quantirade tapping the button independent of frames per second? Thanks!

ps: I've already tried (mylevel + = float * myFPS / 30.09;) but the tapCount value always changes ...