Why calculation methods matter
Islamic prayer-time calculation methods are not just labels. They affect Fajr, Isha, and sometimes Maghrib because organizations use different twilight angles, fixed intervals, or regional conventions. This is why the same city can show slightly different times across apps and mosque calendars.
When in doubt, follow your local masjid. Use this guide to understand why differences happen and to choose the method that best matches your community timetable.
Supported methods at a glance
Karachi
A widely used method in Pakistan, India, Bangladesh, and many South Asian communities.
Read Karachi guideEgyptian
A method commonly associated with Egyptian prayer-time calculations.
Read Egyptian guideISNA
A common North American method used by many US and Canadian users.
Read ISNA guideShia Qum
A Shia Ithna Ashari style method with custom Fajr, Maghrib, and Isha parameters.
Read Shia Qum guideTehran
A Tehran-based method with its own Fajr, Maghrib, and Isha parameters.
Read Tehran guide