Zimem: Qada Prayer Calculator
Missed fasts too, a daily plan
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Stop guessing how many prayers you owe.
Zimem DERIVES your missed prayer and fasting debt from your date of birth and the periods you declare, using established jurisprudential rules - and it shows an honest range, never a single false-precise number.
Then it splits that range into a few seconds of work per day.
HOW IT WORKS
• Three questions, thirty seconds: year of birth, gender, the age you started praying regularly.
• The result screen shows your debt per prayer as a range, plus the assumptions behind it.
• Every assumption is editable in one tap. The more you correct, the narrower the range.
• Add travel, illness, menstruation and postpartum periods and the calculation sharpens.
WHY A RANGE, NOT ONE NUMBER
Nobody remembers the exact day they reached puberty. Pretending otherwise and showing a four-digit certainty is both wrong and paralysing. Zimem never hides uncertainty: it tells you what it does not know, shows the low and high end, and narrows the band as you refine your answers.
IT APPLIES RULES, IT DOES NOT ISSUE RULINGS
Zimem gives no fatwa. It applies established rules - each one cited in the app - to the facts you declare, and does the arithmetic. Under every result you get the reasoning chain: which rule, from which source, at which step.
Where the schools of law disagree, the disagreement is shown on the same screen rather than resolved silently. No ruling enters the engine without a citable source; that link is checked automatically on every build.
FOR WOMEN
Menstruation and postpartum days are deducted from the prayer debt and recorded as fasting make-up days. School-specific maximum durations are applied. The app asks when your cycles ended and stops deducting from that date on.
The accuracy of this calculation is ALWAYS FREE. We will not show a woman an inflated number and charge her for the correct one.
PRIVACY IS ARCHITECTURE HERE, NOT A CLAIM
• No server. No account. No sign-in.
• No location permission. You pick your city yourself.
• No ads, no analytics, no tracking, no third-party SDKs.
• Your data stays on your device and can be erased permanently in one step.
• Our App Store privacy label reads: Data Not Collected.
WHAT IS NOT IN HERE
No Quran text, no translation, no hadith, no recitation audio. No qibla compass, no tasbih, no social feed. No AI - the engine is deterministic and the same input always produces the same result.
FREE FOREVER
The full derivation engine, the debt range, the reasoning chain and its sources, separate counters for each of the five prayers and witr, one-tap logging, prayer time notifications, the home screen widget, school selection, and the menstruation and postpartum deductions.
ZIMEM PRO - PAY ONCE
No subscription. A single purchase.
• Pace simulator: "if I make up two days' worth a day, when am I done?"
• Target-date planning and comparison of pace scenarios
All three price options unlock exactly the same features. The only difference is an alternate app icon and a thank-you on the Sources screen; you decide how much to contribute.
One person builds this app. What you pay goes into building it.
IMPORTANT
Zimem's output is informational and is not a binding religious ruling. For your own situation, consult your local mufti's office or a scholar you trust.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Qibla direction added. We ask for no location permission — it is calculated from the city you selected.
Prayer-time notifications now cover all 81 provinces of Türkiye. The city list grew from 8 to 134, including cities in Germany, the Netherlands, France and elsewhere.
An "I prayed" button right on the notification. Mark your ledger without opening the app.
Record calendar: see how many prayers you completed on each day, in a monthly grid. No streak counter — a day off is not a loss.
Timeline: enter which periods of your life you prayed and which you didn't. "I prayed for two years, then stopped" can now be expressed. The more you enter, the narrower the estimated range becomes — enter enough and it settles on a single number.
The developer, Serdar Guven, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Serdar Guven
- Size
- 1.8 MB
- Category
- Reference
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Zimem Pro — Patron $29.99
- Zimem Pro — Supporter $12.99
- Zimem Pro $5.99
- Copyright
- © 2026 Serdar Güven