By Daniel Park · Updated August 4, 2026 · 3 min read
Prayer times shift every day with the sun. Fajr begins at true dawn, Dhuhr just after solar noon, Asr in the mid-afternoon, Maghrib at sunset and Isha after twilight ends. The exact moment depends on your latitude, your longitude, the time of year and a couple of scholarly choices about how to define dawn and dusk. Modern calculators handle all the math automatically — but understanding why apps sometimes differ by a few minutes helps you trust the numbers you see.
What's really going on
The Prayer Times tool on Rash Tools uses your GPS or a typed city to compute today's five prayers. You can switch between the most common calculation methods used worldwide — Muslim World League, Islamic Society of North America, Egyptian General Authority, Umm al-Qura (used in Saudi Arabia), Karachi (commonly used in South Asia) and Tehran. Each method uses slightly different sun-angle conventions, which is the main reason two apps in the same city can show times that differ by 1–5 minutes.
Asr also has a madhab choice. The Shafi'i, Maliki and Hanbali schools place Asr when an object's shadow equals its own length plus the noon shadow. The Hanafi school places it when the shadow equals twice the object's length plus the noon shadow, which is typically about 30–60 minutes later. Pick whichever school you follow at the top of the tool and Asr (and any timetable you export) will update accordingly.
At high latitudes during summer or winter, the sun may not dip far enough below the horizon to mark Fajr or Isha cleanly. The tool offers the common high-latitude adjustments — Angle Based, Middle of the Night and One Seventh of the Night — which most scholars in those regions accept. If you live somewhere with very long summer days, ask a local imam which rule the community uses and set the tool to match.
Wrap-up
For convenience, enable browser notifications and the tool will remind you a few minutes before each prayer. Pair it with the Qibla Direction tool and you have a complete prayer companion on any device, with no app to install, no signup and no tracking — exactly what you want from a tool that runs five times a day, every day, for the rest of your life.
