Yimaji - Period Tracker
Private cycle & fertility
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
No account, no ads, nothing leaves your phone. Log your period in three taps and see an honest date range — paid once, not per month.
Yimaji records your period, learns your rhythm and estimates what comes next — entirely on your phone. No account, no ads, no analytics, nothing sent anywhere.
WHY YIMAJI IS DIFFERENT
• No account. Open the app and start.
• Nothing leaves your device. Your records stay in the app and, only if you choose, in Apple Health.
• One purchase. No subscription, no renewal, no price that changes next month.
• Honest predictions. A date range with a confidence level and the reason behind it, instead of a single made-up day.
WHAT IT DOES
• Record flow, symptoms, mood, energy, intimacy, temperature and notes in a few taps.
• See your cycle on a calendar with period, fertile window and estimated ovulation.
• Irregular cycles get a wider range and a plain explanation, never a guess dressed up as fact.
• Trying to conceive: see the estimated ovulation day and fertile window.
• Sync with Apple Health in both directions.
• Reminders, Home Screen and Lock Screen widgets, Siri shortcuts, Face ID lock and a privacy screen.
• Apple Watch app and watch-face complications: cycle day, phase and what comes next (Yimaji Pro).
• Export an encrypted backup and restore it on another phone. The passphrase is yours; Yimaji never stores it.
FREE AND PRO
Free: logging, the calendar, predictions, your last three cycles of insight, one daily check-in and one medication reminder, and the small, medium and large Home Screen widgets plus the Lock Screen widgets — plus every privacy feature, Apple Health, encrypted backup and restore, CSV export and data deletion. Those are never behind a paywall.
Yimaji Pro, one-time purchase: insights across your whole record — by cycle phase, symptoms recorded together, what changed against your earlier record, therapy check-ins — the next few periods as ranges, a multi-page PDF report you choose the sections for, custom symptom tags, extra daily reminders, more detail in the large Home Screen widget plus a button that starts your period, Siri shortcuts, the Apple Watch app with complications, and every future update. Try everything free for 3 months.
IMPORTANT
Yimaji provides estimates, not medical advice, and is not a method of contraception.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 建军 赵, 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
- 建军 赵
- Size
- 14.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
English and 9 more
- English, Arabic, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Yimaji 3-Month Trial $0.00
- Yimaji Pro $19.99
- Copyright
- © 2026 jianjun zhao
