Testing on real iOS devices

Hi,


I have placed a transparent CAMetalLayer into a Today Widget. I have seen it running on 3 different phones with the same OS major version. While this stuff works right on my development phone it behaves differently on the other phones (3 different behaviour on 3 different devices).


Is there any good way to do interactive test with such Apps on real devices remotely? I know about AWS device farm but I didn't find there phones with recent iOS.