Android market is getting bigger everyday, and seeing the crummy apps out there this could be hit. I would love to take a peek at your app when it's ready inshAllah. So you would be entering your masjid's all year calender locally one off, so yeah it would be simple elegant and would work. i mean beats keeping 2-3 timetables in your wallet for sure and removes the niggles of 5 different prayer timetable calculation settings/daylight saving settings bla bla ...