Simpluna Period Tracker App

Omoidasu, Inc.

In-app purchases

About this app

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.

Over 600,000 downloads!


—————— 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.

Ratings and reviews

I had been using the free version for a while and I decided I wanted to be able to track a few more things so I was looking for a free app that did what I wanted, but all the ones I found kept track of so much more than I wanted. So I bought simpluna plus. I really like how customizable it is. It can be as simple or as complicated as you want. I do wish there were more options for backgrounds. Some pretty pictures and patterns maybe. But I like this app the most so far.

I love this app! I appreciate that this app has a clear and easy design, and is super easy to navigate! Does exactly what it says, and the free version is just as simple AND as useful as the paid version. You can even set a pin lock to get in.😏 This app also doesn't automatically charge after the the free trial! However, it's only a day long.😕 It would be nice if you didn't have to have the paid version to change the app theme tho.

Simple tracker, nicely laid out. Pretty basic, ended up paying the one time small payment for premium as I really enjoy the look and feel of the app. Well priced, unlike some apps that repeatedly charge you a lot per month. Premium mode is worth the fee and it's quite easy to use. Overall, lovely design, gender-neutral, simple to use. Loving it so far.

What’s new

- You can now import period records and notes from a CSV file
- Added a date range selector and cycle length chart to cycle history
- A field for recording spotting is now available
- Fixed an issue with Health Connect integration