Project works fine in Editor(Remote) but not on iOS

My project runs as is should in the Editor, but after installing it on my iOS device it doesn't work properly anymore.

Swipes which worked fine with Unity Remote stopped working and some GameObjects don't activate anymore.

My question: Are there any specific ways to handle touch input on iOS eg. Do i have to activate Standalone Input model, Touch Input Modul?

And is accessing another scripts value different on iOs than in the Unity Editor?