Anonymous. Browser-only.
Six anonymous, browser-only tools. Lunar dates, hayd classification, qada estimation, the fiqh quiz. Type, calculate, close the tab. The full engine lives in the app.
Date and calendar
Fiqh logic
Multiple-choice questions on hayd, ghusl, fasting, and Quran during hayd, sourced verbatim from sistani.org. Anonymous, in-browser, shareable.
Type a few days of bleeding, see how A. Sistani's 3-day minimum, 10-day maximum, and 10-day tuhr-gap rules classify each day. Reduced version of the full app engine.
When does the post-menopause hayd exemption start in your case? A. Sistani uses 60 lunar years for both Sayyida and non-Sayyida; A. Makarem uses 50 for non-Qurayshi women and 60 for Qurayshi. A. Khamenei refers muqallids to another mujtahid on this question.
Planning and qada
Estimate how many Ramadan fasts you likely owe. Inputs your average period length and how many Ramadans have overlapped with hayd since you became baligh.
Calculate fidya owed for fasts you cannot make up before next Ramadan. One mudd of food (~750 g of staple grain) per missed day, at your local price.