How to Get Accurate Prayer Times

Why two Islamic apps show different times — calculation methods, madhab differences, and how to pick the right method for your location.

Open two prayer apps at the same time and you will almost certainly see two slightly different schedules. Fajr might differ by ten minutes. Asr might differ by an hour. This is not a bug. The apps are using different calculation conventions, and which one is "correct" depends on the scholarly authority your local community follows.

This guide breaks down how prayer times are actually computed, the conventions used around the Muslim world, and how to make sure the times on your phone match what your local mosque announces.

The Five Daily Prayers, Anchored in the Sun

Every prayer in Islam is tied to a position of the sun. The times are not arbitrary — they come from hadith describing when the Prophet (peace be upon him) prayed.

• Fajr — begins at true dawn, when the first light appears as a horizontal band across the sky. Ends at sunrise. The hardest time to calculate, because it depends on how you define the sun's angle below the horizon.
• Dhuhr — starts just after the sun crosses the meridian (solar noon). The least controversial, since solar noon is a precise astronomical event.
• Asr — begins when an object's shadow exceeds its own length (Shafi'i/standard) or twice its length (Hanafi). One of the biggest sources of disagreement between apps.
• Maghrib — starts immediately after the sun dips below the horizon. Most methods agree on this time.
• Isha — begins when red twilight disappears. Like Fajr, depends on which twilight angle you use.

Why Apps Disagree: Calculation Methods

The disagreement comes down to two questions: what angle of the sun below the horizon marks Fajr and Isha, and how you calculate Asr.

Muslim World League (MWL)

18° for Fajr, 17° for Isha, standard Asr. The most common global default — used widely across Europe, parts of the Far East, and as a sensible fallback when nothing else is specified.

ISNA (Islamic Society of North America)

15° for both Fajr and Isha, standard Asr. Designed for North American latitudes where 18° angles produce impractically early Fajr and late Isha. If you are in the United States or Canada and your mosque uses ISNA, your Fajr will be later and Isha earlier than the MWL defaults.

Umm al-Qura (Saudi Arabia)

18.5° for Fajr, with Isha computed as a fixed 90-minute interval after Maghrib (120 minutes during Ramadan). Used across the Arabian Peninsula. Don't use this outside its design region — the fixed Isha interval breaks down badly at higher or lower latitudes.

Egyptian General Authority of Survey

19.5° for Fajr, 17.5° for Isha. Common across Egypt, much of Africa, and parts of Syria and Lebanon. The slightly higher Fajr angle gives a noticeably earlier dawn time.

University of Islamic Sciences, Karachi

18° for Fajr, 18° for Isha, with Hanafi Asr (shadow = 2x object length). The standard across the Indian subcontinent — Pakistan, India, Bangladesh, and South Asian diaspora mosques.

Tehran (Institute of Geophysics)

17.7° Fajr, 14° Isha, with Maghrib calculated 4.5° below horizon rather than at sunset. Designed for the Shia tradition predominant in Iran.

Singapore (MUIS), JAKIM (Malaysia), Diyanet (Turkey)

Several national bodies publish their own conventions, often blending angle-based calculation with a national clock authority. If you are in one of these countries, the local app or the official body's published schedule is usually the safest match.

The Two Asr Opinions

Asr is the prayer where apps diverge most visibly — not by a few minutes but by close to an hour.

The Shafi'i/standard opinion holds that Asr begins when an object's shadow (beyond the shadow it cast at noon) equals the object's own length. The Hanafi opinion requires the shadow to equal twice the object's length. Both positions trace to hadith and have been defended by major scholars for centuries.

In practice this means Hanafi Asr falls roughly 45 to 60 minutes later than Shafi'i Asr. If your mosque is in a predominantly Hanafi community (most of South Asia, much of Turkey, large parts of Central Asia) you want the Hanafi setting. If you're in a predominantly Shafi'i, Maliki, or Hanbali area (most of the Arab world, Southeast Asia, North America) the standard calculation will line up.

The Other Things That Affect Accuracy

Beyond the calculation method, several smaller factors cause apps to disagree:

• Location precision. Picking a city from a list rounds you to that city's center. A GPS-based app uses your actual coordinates — important if you live on the outskirts of a large metro, or in a country where cities are spread across multiple time-relevant longitudes.
• Elevation. Higher elevations see the sun slightly earlier at Fajr and later at Maghrib. An app that ignores elevation will be off by a minute or two in mountainous areas.
• High-latitude rules. Above about 48° latitude (think northern UK, Scandinavia, Canada, northern US) the sun doesn't dip far enough below the horizon in summer to trigger Fajr/Isha by angle. Apps fall back to one of several conventions — "middle of the night," "one-seventh of the night," or "angle-based" estimation. Communities in those regions often follow a fixed local convention.
• Time zone and DST. If your app's selected city and your phone's clock disagree about daylight saving, every time will be off by an hour. After international travel, double-check the city setting.
• Precautionary minutes. Some apps and some mosques add one or two minutes of "ihtiyat" — a safety buffer — after Fajr ends, before Maghrib begins, or both. Worth knowing if you're trying to reconcile two schedules.

How to Pick the Right Method for Your Location

The reliable test: find the printed jamaat schedule at your local mosque. Note the Fajr, Asr, and Isha times for the current week. Then in your app, switch between calculation methods until the times match within a minute or two. That's your method.

If you don't have access to a local mosque schedule, here's a sensible default by region:

Region	Typical method	Asr
North America	ISNA	Standard
UK & Europe	MWL	Standard (Hanafi at South Asian mosques)
South Asia (India, Pakistan, Bangladesh)	Karachi	Hanafi
Saudi Arabia & the Gulf	Umm al-Qura	Standard
Egypt, North & East Africa	Egyptian General Authority	Standard
Southeast Asia (Malaysia, Indonesia, Singapore)	JAKIM / MUIS / MWL	Standard
Turkey	Diyanet	Hanafi
Iran	Tehran	Standard

Getting Accurate Times for Your Exact Location

The most reliable setup is an app that lets you pick your calculation method explicitly, uses your GPS for coordinates rather than a city dropdown, and respects your madhab's Asr opinion.

Niyat calculates prayer times from your real coordinates using the established astronomical formulas. You pick your method and your Asr juristic preference once during onboarding; the app handles location, elevation, and time-zone changes automatically. If you travel — to another city, another country, or even from your apartment to the office — the prayer schedule updates without you having to fiddle with settings.

Frequently asked questions

Why do two prayer time apps show different times?

They use different calculation conventions. The biggest factors are the Fajr/Isha twilight angles (15°, 17°, 18°, or 18.5°), and the Asr juristic method (Shafi'i vs Hanafi). Pick the convention your local mosque follows and the times will line up.

Which calculation method should I use?

Match your local mosque. ISNA is common in North America, MWL across much of the world, Umm al-Qura in Saudi Arabia, Karachi across South Asia. When in doubt, ask the imam or check the printed jamaat schedule and try methods in your app until it lines up.

What is the difference between Hanafi and Shafi'i Asr?

Shafi'i (and standard) holds Asr begins when an object's shadow equals its own length. Hanafi requires the shadow to equal twice the object's length. Hanafi Asr starts about 45–60 minutes later. Both are valid — use the one your community prays by.

Why is my Fajr a few minutes off from the mosque?

Twilight is hard to time precisely. A 3° difference in the Fajr angle moves the time by 8–12 minutes at mid-latitudes. Match your app's method to your mosque's convention and the gap usually closes.

Do prayer times change when I travel?

Yes — even small east-west moves shift them by minutes. Use a GPS-based app rather than a city dropdown. When crossing time zones, double-check your phone's clock and the app's selected city after you land.

How are prayer times calculated at high latitudes?

Above roughly 48° latitude, twilight never fully fades in summer, so the standard Fajr/Isha angles can't be computed. Apps fall back to "middle of the night," "one-seventh of the night," or "angle-based" estimation. Check your local scholar's preference.