Your cycle, on your device

Everything stays with you

Éclose lives entirely on your device: no account, no server, no trackers. No network requests after load — verifiable in your developer tools. You can export your data to an encrypted file and import it back whenever you want.

How it works

• A living dial shows where you are in your cycle, at a glance.
• Logging takes a single gesture: flow, symptoms, a note for the day.
• Predictions come from your own history — honest, never alarming, with a confidence level shown.

What Éclose does not do

• Éclose is not a medical device and cannot be used for contraception.
• No pregnancy tracking, no astrology, no promises.
• No advertising, no data reselling, no third-party SDKs.

Install Éclose

Add Éclose to your home screen from your browser. The app works offline, like an installed application.

Open source

Éclose is free software: its code is public and anyone can inspect it. That's what makes our promises checkable rather than just stated — you don't have to take our word for it, you can look.

Frequently asked questions

Does my data go to a server?

No. Everything is stored locally on your device. Éclose makes no network requests after load.

Do I need an account?

No. No sign-up, no email, no password. You open the app and use it.

Does it work offline?

Yes. Éclose is an installable web app that works without a connection.

Can Éclose be used as contraception?

No. Éclose is not a medical device. Predictions are estimates based on your history.

Is it free?

Yes. Éclose is free — no cost, no subscription, no ads. It's also free software: the code is open for anyone to inspect. If it's useful to you, supporting its development is welcome, but never required.