Ellu: Period & Cycle Tracker

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About this app

Ellu is a calm period tracker that keeps your cycle on your phone. No account, no ads, and no internet access: Android doesn’t let this version of Ellu connect to any network. We don’t receive, store, share or sell your data.

Forecasts with an honest range
When your cycle varies, Ellu shows a window of days instead of one confident date, and says what the forecast is based on. Irregular cycle? The range gets wider. You can also turn forecasts off and keep only a diary.

Log a day in seconds
Flow, energy, mood, pain, symptoms and discharge. Add your own symptoms when the list doesn’t cover it.

Your whole history
Past periods and forecast days on one calendar. Correct any day. See your cycle length, variation and regularity.

Cycle phases
What each phase usually brings, with tips for the day.

Notes and reminders
Keep notes with a reminder when you need one. A daily check-in and a heads-up two days before your period. All reminders are created on your phone.

Widget and lock
Your cycle day on the home screen. Lock Ellu with your fingerprint, face or device passcode; while the lock is on, the widget hides the details.

Setup that fits you
Age comes first, then a few short questions. Under 18, fertile days stay hidden until you turn them on.

Your data, your file
No cloud sync, and Ellu is left out of Android’s automatic Google backup. To move to a new phone, save a backup file in Settings and restore it there. You can also export everything to CSV or delete it all.

Eight languages
English, Русский, Українська, Deutsch, Español, Italiano, Português (Brasil), 简体中文.

Free, with no sign-up. No purchases or subscriptions.

Ellu is not a medical device and not a method of contraception. Fertile days are a calendar estimate, for information only. See a doctor if something worries you.

Privacy policy: https://ellu-app.up.railway.app/privacy/
Support: [e-mail]

What’s new

First release of Ellu on Google Play: a private period tracker with forecasts, daily logs, cycle phases, notes with reminders and a home-screen widget.