If you grew up in Turkey — or follow the timetable of the Diyanet İşleri Başkanlığı (Turkey's Presidency of Religious Affairs) — you may have noticed that many international prayer apps show times that don't match what you're used to. That's because they default to a different calculation method. This guide explains what the Diyanet method is and how to keep it wherever you live.
What is a prayer time calculation method?
Dhuhr, Asr, and Maghrib are tied to observable sun positions (noon, shadow length, sunset) and vary little between methods. Fajr and Isha are different: they depend on how far below the horizon the sun must be for "true dawn" and "nightfall" — expressed as an angle. Authorities disagree on the exact angle, which is why methods exist.
How does Diyanet compare with other methods?
| Method | Fajr angle | Isha angle | Commonly used |
|---|---|---|---|
| Diyanet (Turkey) | 18° | 17° | Turkey & Turkish communities worldwide |
| Muslim World League (MWL) | 18° | 17° | Europe, Far East |
| ISNA (North America) | 15° | 15° | USA, Canada |
| Egyptian General Authority | 19.5° | 17.5° | Egypt, Africa |
| Umm al-Qura | 18.5° | 90 min after Maghrib | Saudi Arabia |
Diyanet's angles are close to MWL, but Diyanet additionally applies its own refinements (such as temkin safety margins historically, and precise astronomical tables), which is why Diyanet times can still differ by a few minutes from a generic 18°/17° calculation — and why matching your trusted timetable sometimes needs small manual adjustments.
Which method should I use?
The practical rule: use the method of the authority you follow, or of your local mosque. If your family, community, or mosque follows the Diyanet timetable, keep Diyanet on your phone too — mixing methods is how people end up praying Fajr before it has truly begun according to their own authority.
How to get Diyanet-based prayer times on iPhone — anywhere
Do it with Vaktim (free, iPhone)
- Install Vaktim — the Diyanet (Turkey) method is the app's calculation method, not a buried option.
- Allow location access: times are computed on your device for your exact coordinates — in London, Berlin, New York, or Istanbul.
- Pick your madhhab for Asr (Hanafi or Shafi'i).
- Compare with your trusted timetable, and if needed use Prayer Time Adjustments (±30 minutes per prayer) to match it to the minute. Adjustments carry into notifications and widgets automatically.
Are on-device times as accurate as the official website?
The astronomy is the same math everywhere; what varies is the location used and the refinements applied. Because Vaktim computes from your exact GPS coordinates rather than a city-centre lookup table, it is often more precise for where you actually stand. For mosque-perfect alignment, the per-prayer adjustment closes any remaining one-or-two-minute gap — check against a trusted timetable once, set it, and forget it.