thank you both for your answers.
I do not want the paid version.
so what I conclude from your answers is that I should be able to see screen shots from the other iphone while I'm using the free version, this is helpful too, I guess I dont need to control the phone, viewing the phone helps aswell.
But the problem is that I still dont understand how to do it.
I downloaded the app on 2 iphones and but the other Teamviewer ID on my phone trying to connect the phone, although it says "connecting" the phone wont connect that why I dont understand what I'm doing wrong