Muslim Pro and Sutrah: a companion app and a calendar tool

Why this is usually the wrong question

Muslim Pro has been published since 2010 and reports more than 190 million downloads. It is, for a very large number of Muslims, simply the app — the Quran, the adhan, the Qibla, the duas, Ramadan, Hajj. Comparing it to Sutrah the way you would compare two note-taking apps produces nonsense, because one of them is a companion for your whole deen and the other writes five events a day into a work calendar.

The comparison is worth making anyway, because a specific group of people search for it: the ones who already have Muslim Pro, already know their prayer times to the minute, and still keep praying Asr at 6pm because the 1:1 ran long. If that is you, nothing about Muslim Pro is failing. You are hitting a problem it was never built to solve.

Where they genuinely overlap

Only on the times themselves, and even there the overlap is narrower than it looks. Both compute salah times from your coordinates using published astronomical conventions. Both let you pick a calculation method. Both will show you a monthly table.

If the two ever disagree, the cause is almost always a settings difference rather than an error — a different Fajr angle, or the Hanafi rather than the Shafi’i shadow rule for Asr, which can move Asr by well over an hour. Those are differences between schools and conventions, not bugs, and both apps are right within the convention they are set to. The calculation methods guide lists the angles, and the Asr guide explains the shadow rule. Set both tools to whatever your local masjid follows and they will agree.

The one thing that is actually different

Muslim Pro tells you when a prayer has begun. Sutrah takes the slot out of circulation days before anyone tries to book it.

That is not a feature Muslim Pro is missing so much as a different category of software. A notification is addressed to you. A calendar event is addressed to everyone who can see your availability — your manager, the person scheduling the sprint review, the recruiter picking a slot from your booking link. On Google Calendar and Outlook, Sutrah also reads the busy times that are already there and slides each prayer into a genuine gap inside its own valid window, so the block is not sitting on top of the standup demanding to be declined.

It is worth being precise about how small that is as a claim. It is one feature. It happens to be the one that decides whether your afternoon has room in it.

The size difference, stated plainly

Muslim Pro is a mature product from an established company — Bitsmedia, in Singapore, a certified B Corporation since 2025 — with a support team, translations into a dozen languages, and more than a decade of releases behind it. Sutrah is a free community project with a much smaller surface. That asymmetry is real and you should weigh it. It also cuts the other way: there is no ad network here, no premium tier waiting behind a feature you rely on, and nothing to upsell you.

Running both

This is what we would actually suggest, and it is not a hedge. Keep Muslim Pro for the adhan, the Quran and everything else it does well. Add a calendar layer only if you recognise the specific failure: the prayer you missed because the meeting was already there.

Nothing conflicts. Sutrah writes only the events it created — on Google it asks for the narrow calendar.events.owned scope, which cannot touch anything else in your calendar — and it has no notifications of its own to compete with an adhan. If you want to see what it looks like before connecting anything, the printable monthly timetable needs no account and no email at all.