Why prayer times differ between apps: a worldwide checklist
Two prayer apps can show different times for the same city without either having a broken clock. Compare the date, coordinates, timezone, calculation method and Asr setting before choosing a timetable. A calculated start time is also different from a mosque’s congregation time.
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- Check location and local time first
- Separate twilight methods from Asr schools
- Take extra care at high latitudes
- A practical comparison and next step
Check location and local time first
Select the correct city and country, especially where several cities share a name. Check the displayed timezone and daylight-saving offset. Travellers should use the destination’s date and timezone: a London phone setting should not determine a Tokyo prayer timetable. Location permission is optional; city search works without it.
Separate twilight methods from Asr schools
Fajr and Isha settings can use twilight angles or an interval. Muslim World League, ISNA, Umm al-Qura and regional authorities can therefore give different results. The Hanafi Asr setting is a separate choice from the provider’s calculation method. Choose the settings recommended by your trusted local authority rather than combining the earliest results from several apps.
Take extra care at high latitudes
In northern Europe, including Norway and Sweden, summer twilight may require a high-latitude adjustment. Inspect the selected rule and compare with the local mosque’s published timetable. Do not assume a calculation preset reproduces every local seasonal adjustment. Start times and Iqamah remain separate records.
A practical comparison and next step
Write down both apps’ city, date, timezone, method, Asr setting and high-latitude rule. Change one setting at a time, then compare again. Our prayer tool exposes these assumptions. If the difference remains, ask the mosque which settings or published timetable it follows; the calculator cannot decide that religious preference for you.
Sources and review status
- AlAdhan — Prayer Time Calculation Methods
Fajr/Isha presets and Asr settings
- AlAdhan — Prayer Times API
Location, timezone and high-latitude parameters
Prepared with AI assistance; not independently certified by a scholar. Check the linked source and qualified guidance for personal religious decisions.
HalalCalculator · Sources and review status