Fajr time today — why apps disagree

Open two prayer apps in the same city and you may see Fajr times ten minutes apart. Neither is broken — they're answering slightly different questions.

The angle under the horizon

Fajr begins at true dawn, when light first spreads across the horizon. Astronomically that's defined by how far the sun sits below the horizon: the Karachi method uses 18°, ISNA uses 15°, Umm al-Qura uses fixed offsets in Ramadan. A three-degree difference is real minutes on the clock — more the further you are from the equator.

Your coordinates matter more than your city

Apps that resolve your "city" to its centre can be several kilometres — and a minute or two — off your actual sky. Compute from device coordinates and the disagreement shrinks.

What to do

Pick the calculation method your local masjid follows, set it once, and stop comparing apps. Consistency beats precision shopping.