Simpluna Simple Period Tracker

A simple menstruation tracker with a menstrual cycle calendar, period predictions, and no ads.
Record your period and check your next predicted date at a glance. No account is needed for everyday tracking.
Your records are stored on your device. Cloud backup and data sharing are optional.
Simpluna Plus is available as a one-time purchase, with no subscription.

Open the calendar, tap the start or end date, and your next predicted period is shown on the calendar.
Predictions shown in the app are estimates based on your records.
They are not intended for medical diagnosis or treatment, or for decisions about contraception or pregnancy.
No articles, AI chat, or forums — just your records and predictions.


—————— Features ——————

Simpluna is a simple period tracker app. Use it as a menstrual cycle tracker to record period dates and check predictions at a glance.
When you launch the app, a calendar appears so you can check your next predicted period and past periods. By cutting unnecessary features and keeping things as simple as possible, we make sure the app does not get in the way of your daily life.


▶ Easy recording
To record your period, just tap a date on the calendar and press the start or end button. It is intuitive, so there is nothing new to learn.

▶ Notes on each day
If there is anything you want to keep track of, such as how you feel or your physical condition, you can leave it as a note.

▶ Notification before the predicted date
You can receive a notification as your next predicted period approaches. You can specify how many days in advance and at what time you want to be notified.

▶ Register up to 1 year of past data
If you have past period records, you can register them. The available range goes back up to 1 year from when you started using the app. (With Simpluna Plus, you can register up to 10 years.)

▶ Forecast calendar up to 1 year ahead
The forecast calendar lets you look up to 1 year into the future. You can also save future plans as notes and view them together with the predictions.

▶ List of past periods
You can review your past periods as a list.

▶ App lock
You can lock the app with a 4-digit passcode if you do not want others to see it. Biometric authentication is also supported.

▶ Dark mode support
The UI colors automatically switch to match light or dark mode.

▶ Works offline
You can keep using the app even when offline or with a poor signal.


—————— Simpluna Plus (Paid: one-time purchase) ——————

▶ Color themes
16 colors are available.

▶ Ovulation tracking
Predict and manage ovulation, including the window around it.

▶ PMS period display
The PMS period is shown as an underline on the calendar. You can change the number of days for the period.

▶ Pause
Pause predictions during pregnancy, treatment, or other times.

▶ Prediction summary
Show your current cycle day, next period, and ovulation prediction on the home screen.

▶ Customizable input fields
Add custom fields such as symptoms, flow, temperature, or medication.

▶ Customizable notifications
You can freely change the timing and message of notifications.

▶ Pill reminder
Set daily pill reminders, active periods, break periods, and the message.

▶ Widget
Show your next predicted period as a home screen widget.

▶ Past data registration (up to 10 years)
You can register data going back up to 10 years from the day you started using the app.

▶ Health Connect integration
Auto-sync period dates, import from Health Connect, and export.

A 24-hour trial is available before purchase (you will not be charged automatically).


—————— Other one-time purchases ——————

▶ Permanent cloud backup
Continuous cloud backup. Short-term and manual backups are free.

▶ Data sharing
Share records and predictions with someone you choose. Includes data backup.