For every Shia woman who has ever asked it.

Can I pray today?

Tuhr answers it. In half a second, with a citation, accurate to your marja. Your cycle, your phone, your fiqh.

Early access opening June 2026 · iOS & Android

Why we built it

The question every Shia woman asks every month.

Day eight of her cycle. Still bleeding. Hayd or istihada? She checks A. Sistani's office. She closes the tab. She still isn't sure.

Tuhr is the answer. Built on the actual rules. Cited every time.

Try a tool while you read

Try it now Hayd or istihada? See the engine Play the quiz 21 questions, customisable, shareable
3 marjas supported A. Sistani · A. Khamenei · A. Makarem Shirazi
60+ rulings encoded Hayd, ghusl, fasting. Drawn from each marja's Tauzih al-Masail, the rulings manual their muqallids follow.
0 servers see your cycle your cycle, daily logs, and qada tracker live on your phone. We do use anonymous analytics and crash reports so we can fix bugs.
Tap, learn, repeat

A tappable card stack of everything you'll want to look up.

Glossary terms, A. Sistani Q&A, and the rules behind the engine. Sourced, shareable, made for one hand.

Open the cards
How you'll use it

Open the app. Get your answer.

One screen. Colour coded. Cited to your marja. Tap for the reasoning, or don't.

Three marjas supported

Three marjas. Day one.

Pick yours during setup. Every ruling in Tuhr adjusts to it. If yours isn't here yet, tell us when you join.

A. SistaniNajaf
A. KhameneiTehran
A. Makarem ShiraziQom
Your cycle stays yours.
Your cycle, daily logs, and qada tracker live on your phone. No ads. No accounts.
Try it before launch

The fiqh tools.

Each tool cites the A. Sistani ruling it follows.

Quiz · new
Fiqh quiz

21 questions on hayd, ghusl, fasting and Quran. Sourced verbatim from sistani.org. Customise length and difficulty. Shareable.
Fiqh
Hayd vs istihada

Type a few days of bleeding, see how A. Sistani's 3-day / 10-day rules classify them.
Lunar age
Islamic age calculator

Your age in lunar years. Menarche, menopause thresholds at a glance.
All six
See everything →

Fiqh, lunar dates, planning, the quiz. All anonymous.
Three things we promise

What you can actually count on.

  1. 01

    We cite. We don't interpret.

    Every fiqh ruling links to its primary source on sistani.org, leader.ir, or makarem.ir. We don't claim authority we don't have. We just make it easier to find what your marja's office already said.

  2. 02

    Your cycle stays on your phone.

    No user account. Your cycle, your bleeding logs, and your qada tracker live on the device, not on our servers. We use standard third-party tools for crash reports and aggregate usage so we can fix bugs. None of them see your cycle data.

  3. 03

    This site is a taste. The app is the thing.

    The fiqh classifier, the qada estimator, the glossary, the curated Q&A, the card stack, the quiz. All of it stays here, open. The full engine, your private records, and the daily answer to can I pray today live in the app.

Common questions

You might be wondering.

When does Tuhr launch?
Early Access opens June 2026. Join the waitlist and we will email you first.
Which scholar does Tuhr follow?
Three on day one: A. Sistani, A. Khamenei, A. Makarem Shirazi. You pick yours during setup. Every ruling in the app adjusts to it. If yours isn't here yet, let us know when you join.
Is my data really private?
Yes. Your cycle data stays on your phone. No account. No cloud sync. We use standard third-party tools for crash reports and aggregate usage; they never see your cycle data.
Can I see what the fiqh engine knows before I install?
Yes. Try the hayd vs istihada classifier, browse the A. Sistani Q&A library, or read the glossary.

Secure your spot.

We'll email you the moment Tuhr is ready.

Private by design. Scholar reviewed. Shia built.