Luna Cycle - Period Calendar

A simple and easy-to-use period tracking and cycle prediction app.
Log your period records and clearly view your next estimated period date and cycle trends on a calendar.

You can record your period start and end dates, flow, symptoms, and notes, making it easy to look back on monthly changes at your own pace.
With reminders enabled, you can also receive notifications when your next estimated period is approaching.

Your records can be reviewed in the History and Analysis screens, where you can check your average cycle length, average period length, common symptoms, and flow trends.
You can also add, edit, and reorder symptoms, so you can keep tracking in a way that fits you best.

● Main Features
[Quick and easy period logging]
・Record period start and end dates
・Log flow as Light, Medium, or Heavy
・Select and save symptoms
・Add notes to record how you felt that day
・Tap a date to open the record screen directly

[Clear calendar view]
・View records and estimates in a monthly calendar
・Check your next estimated period date
・Optional ovulation prediction display
・Switch between previous and next months
・Jump to any month by selecting the year and month directly
・Swipe left or right on the calendar to move between months

[Easy-to-understand estimates]
・Estimate your next period date based on your records
・Automatically calculate average cycle length and average period length
・You can also set cycle length and period length manually
・Ovulation prediction display can be turned on or off
・Estimates are shown clearly on the calendar

[Get notified before your next period]
・Set reminders for your estimated period date
・Flexible timing options such as on the day, 1 day before, 3 days before, 5 days before, and 7 days before
・Reminder titles can be customized to suit your preference
・Add, edit, and delete reminder rules
・Register multiple reminder rules

[Review your history]
・View past records month by month
・Filter by time period
・Supports last 3 months, 6 months, 12 months, and custom ranges
・Check past flow, symptoms, and notes together
・Designed to make older records easy to review

[See your trends in Analysis]
・View average cycle length and average period length
・Check flow trends
・See which symptoms you log most often
・View recent changes in cycle length clearly
・Reflect on your trends by selec