Does not load App shows blacks

This app does not load on Apple touch iOS 8.3 or 8.4. It did work on my iPhone 4 with iOS 7. I installed this app on 4 devices total as a test.3 Apple touch, 2 using iOS 8.3, 1 using iOS 8.4 and one iPhone 4. The iPhone 4 worked.

EigetNosdivad about easyTek