Why prayer times differ between apps, and which one to follow

Why two apps can both be right

The Quran and the Sunnah do not give prayer times in hours and minutes. They give signs you can see: the sun passing its highest point, a shadow growing, the sun setting, the red glow leaving the western sky, the first thread of light spreading along the eastern horizon. The Prophet ﷺ set out the span of each prayer in one short teaching:

For centuries, a muezzin looked at the sky and called the adhan. A phone cannot look, so it calculates. Three of the signs are easy for a computer: noon (the sun crossing the meridian), sunrise and sunset. Those agree between apps to within a minute or two. Three are not: the exact moment of true dawn, the moment twilight is gone, and the shadow that starts Asr. Every disagreement you will see comes from how those three are translated into numbers, plus a few practical settings layered on top.

If your two apps are one or two minutes apart, it is the last row and it does not matter. If they are twenty minutes apart at Fajr, or forty at Asr, it is one of the first rows, and it is worth deciding deliberately.

Fajr and Isha: how far below the horizon?

Fajr begins at true dawn, the moment that also begins the fast:

The Prophet ﷺ distinguished this true dawn from an earlier, misleading glow. The false dawn (al-fajr al-kādhib) is a faint vertical column of light; the true dawn (al-fajr al-ṣādiq) spreads sideways along the horizon:

Isha begins when the twilight after sunset (al-shafaq) has disappeared. Astronomy describes both moments by one number: how many degrees the sun sits below the horizon when the light first appears in the east, or when the last of it leaves the west. At 18° below the horizon the sky is, by the astronomer's definition, fully dark. The light builds as the sun climbs from there to the horizon, and the question every method has to answer is: at which depth does the white thread actually become distinct?

Different bodies have answered differently, from their own observations and from the classical astronomers who placed dawn around 18° to 19°:

How far apart that puts the times

Here is a single day, 23 October 2026, in Toronto, worked through each method. Dhuhr, Asr and Maghrib barely move. Fajr and Isha move a lot:

Forty-one minutes separate the earliest and latest Fajr. In the tropics the spread is smaller, because the sun drops steeply; far north it is larger, because the sun slides along the horizon. The size of a degree in minutes changes with your latitude and the season, which is why the gap between the same two apps grows in summer.

Why the bodies disagree

Not because some of them are careless. True dawn begins as a very faint light, and where people see it depends on how dark the sky is, how clear the air is, and how carefully the observers watch. Modern observation campaigns have reached different results, and some bodies have changed their figure after them:

• Malaysia. After a year of dawn observations by JAKIM with several universities, the national Muzakarah committee decided on 20 to 21 November 2019 that Subuh begins at 18° rather than 20°, about eight minutes later. States adopted it in turn; Selangor announced its change in 2023.
• Indonesia. Muhammadiyah's Majelis Tarjih moved from 20° to 18° (decided in 2020, implemented in 2021), while the Ministry of Religious Affairs kept 20°, citing its own observations. Two serious bodies in one country, both observing, still differ.
• North America. The Fiqh Council of North America, in 2017, recommended 15° for the United States and 13° for Canada, year round, describing them as approximations that spare people from observing the sky every day.
• London. The London Unified Prayer Timetable, adopted by a group of London mosques from 1 Ramadan 1432 (1 August 2011), uses a model by Khalid Shaukat of moonsighting.com that is guided by observation data from northern latitudes rather than a single fixed angle.

This is a question of ijtihad about a physical sign, not a disagreement about what the sign is. Everyone agrees Fajr begins at true dawn. They differ on where to draw the line in a sky that brightens gradually.

Isha: which twilight?

There is also a classical difference over the shafaq itself. After sunset the western sky first glows red, then a paler white glow lingers after the red has gone. The Maliki, Shafi'i and Hanbali schools, and Abu Hanifa's two principal students Abu Yusuf and Muhammad al-Shaybani, held that Isha begins when the red twilight disappears. Abu Hanifa held that it begins when the white twilight has also gone, which is later. Hanafi texts differ on which view carries the fatwa. Most calculation methods put Isha at 15° to 18°, which is near or past the end of the white glow, so in practice both views are usually satisfied. The Moonsighting Committee method lets you choose between the two twilights for Isha.

The fixed-interval methods

Umm al-Qura, used across Saudi Arabia, does not use an angle for Isha at all. It sets Isha 90 minutes after Maghrib, and 120 minutes in Ramadan. Near the tropics in most seasons that lands close to the 17° to 18° time. Far from the tropics it does not: in Birmingham on 23 October it gives 19:26, while 18° gives 19:50. A fixed interval is a sensible approximation for the latitude it was designed for, and a poor one elsewhere.

Asr: one shadow or two

Asr is the prayer where the schools differ most visibly, and the difference is old and well documented. The evidence is the narration of the two days on which the angel Jibril led the Prophet ﷺ in the five prayers, to show him the start and end of each time:

Read on the first day, Asr starts when an object's shadow equals its height. Read on the second, Dhuhr is still being prayed at that moment and Asr follows at twice the height. The schools resolved this differently:

• One shadow length (mithl). The Maliki, Shafi'i and Hanbali schools, and among the Hanafis, Abu Yusuf and Muhammad al-Shaybani. Asr enters when the shadow of an object equals its height.
• Two shadow lengths (mithlayn). Abu Hanifa, and the position most Hanafi texts adopt. Asr enters when the shadow equals twice the height. Some major Hanafi works chose the students' view, and many Hanafi scholars advise praying Dhuhr before one shadow and Asr after two, so the prayer is sound on both views.

Both measure the shadow from the shadow the object already casts at noon (fay' al-zawāl). In winter, or far from the equator, the sun is low even at midday, so that noon shadow can be longer than the object itself, and both Asr times move earlier in the day. Both views also agree that Asr should not be delayed until the sun turns pale and yellow.

Every app has a setting for this, usually called “Asr method” or “juristic method”, with two options: Standard (or Shafi'i, Maliki, Hanbali) and Hanafi. If one of your apps is on each, Asr will differ by much more than anything else on the screen:

In each cell, the first time is one shadow and the second is two, in local time and before any official safety minutes. The gap runs from under half an hour in a northern winter to well over an hour in summer. Neither is the “right” Asr for everyone: choose the one your school follows, and if you follow no particular school, the one your masjid uses.

High latitudes: when the night never gets dark

Every angle-based method assumes that the sun goes far enough below the horizon for twilight to end. In much of Europe and Canada, in summer, it does not. In London the sun gets no deeper than about 15° below the horizon at midsummer, so an 18° Fajr simply never arrives from about the last week of May to the third week of July. In Birmingham, even 15° is not reached from early June to early July. In Glasgow, even 12° fails for almost six weeks. In Stockholm and Oslo, 18° fails for nearly four months.

The prayers are not dropped because a sign is missing. The Prophet ﷺ was asked about the long days of the Dajjal, one of which will last a year:

Scholars took from this that when the signs do not appear, the times are estimated (taqdīr), not abandoned. The Islamic Fiqh Council of the Muslim World League, at its ninth session in Makkah in Rajab 1406 (1986), divided the high latitudes into bands: between about 45° and 48° the signs appear and the ordinary times apply; between 48° and 66°, where twilight can last all night, Fajr and Isha are estimated by analogy with the nearest region where they are clearly marked; beyond 66°, all the times are estimated from latitude 45°. How to estimate is where the rules in your app come from:

Those rows are all the same city on the same night. Fajr ranges across two and a half hours, and because Fajr also ends suhur, so does the start of the fast. This is the one area where you should not pick a rule yourself. Ask what the masajid in your city use and follow them: in London most major mosques follow the unified timetable; the Diyanet-affiliated communities in Germany and Sweden follow Diyanet's published tables, which handle the white nights in their own way; many other UK mosques use the one-seventh rule in summer.

Official and mosque timetables

A calculation method is a stand-in for something better: an authority that has already decided the times for your place. Many countries and some cities publish one:

• National tables: Diyanet in Turkey, JAKIM in Malaysia (zone by zone), the Ministry of Religious Affairs (Kemenag) in Indonesia, MUIS in Singapore, the official Awqaf times in the UAE, Umm al-Qura in Saudi Arabia, and the Ministry of Habous in Morocco.
• City tables: the London Unified Prayer Timetable, published through the East London Mosque and used by London Central Mosque and many others.
• Your own masjid: almost every mosque prints a monthly timetable with its start times.

Where one of these exists, it is usually the best answer, because it carries local observation, local scholarly agreement and local safety margins that no general method reproduces. On 23 October 2026 in London, an 18° calculation gives Fajr at 05:46 and Isha at 19:36. The unified timetable gives 06:00 and 19:19. The difference is not an error in either; it is the difference between a general rule and a local decision.

Start times are not jama'ah times

The most common reason a mosque timetable “disagrees” with an app has nothing to do with angles. A mosque timetable usually has two columns: the start of each prayer (sometimes labelled “begins” or “adhan”) and the jama'ah or iqamah, when the congregation stands to pray. An app shows the start. On that same London day, Fajr begins at 06:00 and the East London Mosque congregation prays at 06:20; Isha begins at 19:19 and the congregation prays at 19:45. Compare an app with the start column, not the jama'ah column.

The last few minutes

When two apps use the same method and still differ by a minute or two, the cause is one of these:

• Safety minutes (iḥtiyāṭ, or temkin in Turkey). Many authorities add a few minutes so that no one prays a moment early: Diyanet adds minutes to Dhuhr, Asr and Maghrib and takes them from sunrise; several Gulf and North African tables add three to five minutes to Dhuhr and Maghrib.
• Dhuhr after noon. Dhuhr starts once the sun has passed its highest point (zawāl). Most apps add one to five minutes to true noon to be sure it has.
• Rounding. Rounding to the nearest minute, or always up, moves half the times by one minute.
• Location and elevation. A phone that only knows your city centre, or a high-rise or hill town where the sun sets later, shifts sunrise and Maghrib by a minute or two.
• Time zone and daylight saving. A wrong zone on the day clocks change can move every time by an hour. If one app is exactly sixty minutes out, check this first.

How to choose: a short decision path

1. Is there an official timetable for your place? Use it. If your app supports it directly, choose that; if not, pick the matching method and adjust it by minutes to agree with the table.
2. Do you pray at a masjid? Match its start times. Ask the imam or committee which method they use. It is good for a community to stand together for Fajr and break the fast together in Ramadan.
3. Otherwise, use your country's main method from the table below.
4. Set Asr to your school: Standard (Maliki, Shafi'i, Hanbali) or Hanafi.
5. Above about 48°, use the summer rule your local masajid use. Do not choose one for convenience.
6. Fine-tune with minute adjustments, not by switching methods. If your masjid is consistently two minutes later at Maghrib, adjust Maghrib by two minutes and leave the method alone.

Every one of the city prayer-time pages names the method it uses and shows both Asr times, so you can compare it with your masjid before you change anything.

If you have been using a different method

Discovering that your app was set differently from your masjid is not a reason for anxiety. Each of these methods is an effort by qualified people to apply the signs Allah set, and a prayer offered in good faith on a recognised timetable is not something you need to repeat. When Malaysia moved Subuh eight minutes later in 2019, the Federal Territory Mufti's office stated that prayers prayed on the earlier timetable did not need to be made up. What matters is that, from now on, you pray within a time you have good reason to trust.

The one situation that does deserve care is Fajr at the very start of its time, because praying before the time has begun does not count, while eating a few minutes into it would break the fast. The Fiqh Council of North America advises those who can to delay the Fajr prayer by a few minutes after the calculated start, and to stop eating a few minutes before it. That small habit makes your Fajr and your fast sound on almost every method.

What Barakah Life does

The Barakah Life app was built to make these choices visible rather than hide them:

• The method your country uses, by default. When you set your location, the app picks the method most masajid in your country follow: ISNA in the United States, the Fiqh Council's 13° in Canada, Karachi in South Asia, Umm al-Qura in Saudi Arabia, Diyanet in Turkey and for Germany and Sweden, UOIF in France, and so on. You can change it in Settings at any time.
• Official timetables where we have them. In Greater London the app uses the London Unified Prayer Timetable itself, on every screen, in widgets and for the adhan, and shows the East London Mosque jama'ah times beneath the start times. In Malaysia and Indonesia, the prayer tab shows the official JAKIM and Kemenag times for your zone.
• Your Asr school. Standard or Hanafi, chosen once, and never hidden.
• A high-latitude rule that matches your method. Automatic by default, with middle of the night, one-seventh and angle-based available if your masjid uses one of them.
• Minute adjustments for each prayer, so you can match your masjid exactly without changing method.
• Adhan alarms on the times you have chosen, with a salah tracker alongside.

Questions people ask

A closing word

It is easy to treat all of this as a technical problem and forget what it is for. Allah tied our prayers to the movement of His sun and the turning of His night:

The scholars who argue over 15° and 18° are trying to honour that sign as precisely as they can. Your part is simpler: choose a timetable you have good reason to trust, keep to it, and let the time of each prayer become the shape of your day. And now and then, step outside before Fajr and watch the white thread spread along the horizon for yourself.

Sources

• Quran 2:187, 4:103, 17:78 (quran.com).
• Sahih Muslim 612, 1094, 2937; Sunan Abi Dawud 393; Jami' at-Tirmidhi 149. Gradings as recorded by al-Albani and others on sunnah.com.
• Fiqh Council of North America, How should the times of Fajr and Isha be calculated? (General Body meeting, 27 to 29 October 2017).
• Islamic Fiqh Council of the Muslim World League, ninth session, Makkah, Rajab 1406, on prayer and fasting at high latitudes, as reproduced in Praying and Fasting at High Latitudes (IslamOnline), with the European Council for Fatwa and Research's endorsement.
• London Central Mosque and Islamic Cultural Centre, Unified Prayer Timetable for London; East London Mosque, Prayer times and calendar explained; London Unified Prayer Timetable data via londonprayertimes.com.
• Jabatan Mufti Wilayah Persekutuan, Bayan Linnas on the eight-minute Subuh change; Mufti of Selangor, Hanya waktu Subuh yang berubah (2023).
• Muhammadiyah, Keputusan PP Muhammadiyah tentang kriteria awal waktu Subuh (2021); Kementerian Agama on the −20° criterion, reported by CNN Indonesia (2020).
• Moonsighting Committee Worldwide, How we calculate Muslim prayer times.
• On the schools' positions on Asr and the shafaq: SeekersGuidance, The Hanafi Asr time; IslamWeb fatwa 8690 on the shafaq.
• Method parameters as published by the adhan open-source library, METHODS.md. All worked times in this guide were calculated for 2026 with the same library the Barakah Life app uses.

This guide summarises the positions of the schools and of contemporary bodies as recorded in the sources above. It is a study aid, not a fatwa. Where your situation is unusual, follow the masajid and scholars of your own city.