In addition to showing Qibla direction (using the built-in compass and GPS on iPhone) this app offers these features:
1- Prayer Times (calculated by seven different methods);
2- Moon phase (present status);
3- Date according to Hijri calendar;
4- Your current location and Qibla direction on the map, or satellite image, using GPS;
5- You can change between "True North" and "Magnetic North" in the settings;
6- You can choose different background images for the compass.
Battery use disclaimer: This application uses GPS for location services. Continued use of GPS running in the background can dramatically decrease battery life.