A period tracker for Shia women, built by Shia, with a focus on privacy, education, and the rules that actually apply.
Tuhr is a period tracker built for Shia women.
There are two reasons it exists.
The first is privacy. Most period apps store everything on a server somewhere. They predict ovulation, sell ads, and share data with third parties whose business models you cannot audit. For something as personal as a menstrual cycle, that arrangement asks you to trust a lot of people you will never meet.
The second is harder to name in one word. The support around all of this is thin. The topic is treated as taboo at home, in mosques, in classrooms. Walking up to the local maulana to ask whether yesterday’s spotting counts as hayd is, for most women, simply not on the table. There is no formal education on it for most of the women who need it; what they know they have pieced together from a mother, a sister, a screenshot in a WhatsApp group, a thread three years old. So they end up scared to act on what they think they know. Can I pray today, did I miss a fast, do I owe qada. And the support that should make these questions easy makes them lonely instead.
The tools don’t help either. The cycle goes in one app. Missed prayers and fasts get jotted in a Notes file or scribbled at the back of a journal. Ayat prayers, the ones owed for every lunar eclipse and every earthquake, sit in a voice memo or get forgotten entirely. The qada debt (what is owed, since when, how many years back) lives in someone’s head. None of the existing trackers know what hayd is, what istihada is, when the fast starts, or how to keep track of missed prayers and fasts. So she juggles four tools and a notebook, and is still mostly not sure.
We wanted one thing that took all of it seriously. Cycle, prayer, fast, ayat, qada, in one place. Cited to her marja, on her device. And alongside the app, a small set of things on this website that quietly educate: a glossary, a Q&A library sourced verbatim from her marja’s office, a swipeable card stack, a fiqh quiz, and a hayd-vs-istihada classifier she can run without an account. So the questions stop feeling forbidden and start feeling answerable.
A small, private app that does not upload her cycle. Built by Shia, for Shia. Cycle, logs, and missed-prayer tracker stay on her device; the app uses standard tools for crash reports and aggregate usage so we can fix bugs.
That’s the whole pitch. Early access opens June 2026. We will email you the day it does.
Ali
p.s. Tuhr (طُهر) means purity. The state of being clean, ritually and otherwise. It is the answer to the question.