Prayer times not correct

This is a really good app and I like everything in it at first ai bought the app for the calender because I really liked it but I dont need the prayer times considering that i live in a muslim country and we have mosques here , but I really wanted to get the prayer times right its always wrong by five minutes or 20 minutes sometimes and Ive done everything to fix it but its not working .... Maybe Im doing something wrong but I really want you to check the app for bugs .... Thanks

Used it alot about iPray: Adhan · Prayer · Qibla, v5.0