Not doing anything I expected

I bought this app so I can listen to Athan five times a day!! It only worked few times and its not working now despite that the alarm is set! I also couldnt change the Athan to another reciter! Very usrless

Moody2011 about Azan Pro (Muslim Azan Times, Quran Audio, Qibla, Prayer Counter, Tasbih, Athan)