LunaCat- Cycle, Ovulation, TTC
Period & Ovulation Tracker
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Never lose track of when your period's coming.
LunaCat predicts your next period and ovulation day, ahead of time.
■ Two taps, and you're done
Just tap once on the day your period starts.
- No complicated input, just the start date
- Your next cycle is calculated automatically from what you've logged
- Fix a past entry anytime, right from the calendar
■ See everything on one calendar
Days you had your period, your predicted period, predicted ovulation day, and fertile window are each shown with their own color and shape.
- Switch between month and year view
- Browse from 2025 through 2027
- Tap any date to see that day's log instantly
■ A home screen that adapts to your goal
Your home screen changes depending on whether you're trying to conceive or just tracking your cycle.
- Trying to conceive: your fertile window and predicted ovulation day take center stage
- Tracking your cycle: your next period date front and center
- Want to understand your body: articles matched to today's phase
- Swipe the weekly strip at the top to see other days and log straight to them
■ Home screen widget
- See how many days until your next period
- Hidden by default — turn it on in Settings
■ Reminders, on your schedule
- Upcoming period alert
- Ovulation and fertile window alert
- Birth control pill reminder (set your own time)
- Daily logging reminder (set your own time)
■ Log how you're feeling
- Symptoms, mood, vaginal discharge, digestion, physical activity
- Sex and contraception
- Luna's expression changes with the mood you log
- Your logs around now — what you noted at this point in past cycles, right on Home
■ Cycle analysis
- Average cycle length and period length
- See at a glance whether your cycle is regular (ACOG's 24-38 day standard)
- A month-by-month chart of your cycle
- Symptom heatmap — a table of when you logged each symptom
■ Share with your partner
- Turn your fertile window and expected ovulation into a card and send it through your usual messenger
- Choose what goes in: expected ovulation, fertile window, a general note about this phase, or the moods and symptoms you logged
- The card is built on your phone and never passes through a server
■ Things worth reading
- Understanding the 4 phases of your cycle
- Dealing with PMS
- Choosing period products that fit you
- Learning about birth control methods
- Signs that mean it's time to see a doctor
■ Keep it to yourself
- Lock the app with your fingerprint or face
- Block screenshots and screen recording
- Hide notification content (lock screen shows only "LunaCat")
Your data stays on this device only - no sign-up required.
LunaCat is not a medical device. Predictions are for reference only, and fertile-window predictions are not a form of contraception. Please consult a healthcare professional for medical decisions.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Swipe the weekly strip on your home screen to see other days — your fertile window and predicted ovulation now show on it
• Pick any day and log straight to that day
• New home screen widget — how many days until your next period (hidden by default, turn it on in Settings)
• New symptom heatmap in Analysis — a table of when you logged each symptom
• Smoother transitions when you switch tabs
• Fixed numbers overlapping in the Analysis charts
The developer, JINTAE IM, 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
- JINTAE IM
- Size
- 47.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 7 more
- English, Dutch, French, German, Italian, Korean, Portuguese, Spanish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Uha Project