Freezes all the time

Since the iPhone update I cant read the hadiths nor can I adjust anything because the app freezes and I have to keep uninstalling and reinstalling. :-(
Does NOT work on iPhone6s plus. Nor do the developers return emails for app support.

Djazzsinger about منبه صلاة الفجر Fajr Alarm - Year round Dawn time calculator and muslim prayer clock for the "four seasons"