• The app averages the length of your last 6 logged cycles, ignoring gaps longer than 90 days (such as pregnancy or breastfeeding).
• Until you have logged at least two periods, it uses the cycle length you chose in Settings.
• Ovulation is estimated 14 days before your next expected period; the fertile window runs from 5 days before ovulation to 1 day after.
• Period length is the average of your logged periods, or the value in Settings (2 to 15 days).

The more you log, the closer the estimates get, and the app tells you when your cycles vary a lot. These are estimates — not medical advice and not contraception.

The app uses the Umm al-Qura calendar. If the month starts earlier or later where you live:

1. Open Settings → “Language & calendar”.
2. Under “Adjust Hijri date”, tap + or −, up to 2 days either way. (+1 if your month started a day before Umm al-Qura.)
3. A preview of today's Hijri date lets you check.

The adjustment applies to every Hijri date in the app, including the Ramadan planner. You can also hide Hijri dates in the same section.

For your privacy the PIN is only kept as a hash on your phone, so we can't see, recover or reset it.

• If you turned on Face ID or fingerprint unlock, open the app with it as usual. (Changing the PIN or turning the lock off needs the current PIN.)
• Otherwise: on the lock screen tap “Forgot your PIN?”, then “Delete all data”. All app data is deleted, the PIN is removed and you start fresh. This cannot be undone.

Open Settings → “Restore purchases” (also on the subscription screen). Use the same Apple ID or Google account you subscribed with — there is no in-app account.

• In the app: Settings → “Manage subscription” (opens your store's subscriptions page).
• On iPhone: Settings → your name → Subscriptions, choose the app → Cancel Subscription, or apps.apple.com/account/subscriptions.
• On Android: Google Play subscriptions.

Cancel at least 24 hours before the renewal date. You keep Premium until the paid period ends, and deleting the app does not cancel the subscription.

This is a Premium feature: Settings → “Export data (CSV)”. It creates period-calculator.csv with your period dates and daily log (flow, moods, symptoms, notes) and opens the share sheet, so you can save it to Files or send it to your doctor. The file opens with Arabic intact in Excel, Numbers and Google Sheets.

Your data moves with your phone's backup or transfer tool (iCloud or Quick Start on iPhone, Google backup on Android). For security the PIN does not move, so the lock turns itself off on the new phone and the app tells you; turn it back on in Settings → “Privacy”. If you subscribe, also tap “Restore purchases”.

• Make sure notifications are allowed for the app in your phone's settings.
• Turn on the reminders you want in Settings → “Reminders”.
• For privacy, reminders show a generic text by default. To show details: Settings → Privacy → “Show details in notifications”.
• In pregnancy mode, period and ovulation reminders pause.

Settings → “Delete all data” (at the bottom), then confirm. It is permanent, cannot be undone and does not cancel a subscription. You can also delete the app from your phone.

Yes. No account, no ads, no tracking — everything you record stays on your phone. Apart from subscription checks, the app sends only anonymous usage steps (never health data), which you can turn off in Settings → Privacy → “Share anonymous usage”. Details are in the Privacy Policy.