Your period data stays on your device

Cycle is a private log. This page says what the page does with your data.

This is a personal log. It is not medical advice and not birth control. Predictions are estimates. Ask a doctor or nurse about your health.

What happens to your data

Your days, symptoms and notes stay in this browser. The page sends them to no server.
The page has no account, no sign-in and no ads.
The page saves your log in local storage. The key is cycle:data:v1. Anyone who can use this browser profile can read it.
The estimate is computed in your browser from the days you log.
Cloudflare hosts this site. Cloudflare Web Analytics may count page views. These counts hold no data from your log.
If the page has an error, it sends an error report to the server. The report has no days, symptoms or notes.

Choose Download JSON or Download CSV on the start page to save a copy. The file goes to your device only.
You can import a JSON export on another device. Nothing goes through a server.
Choose Delete all data on the start page to remove the log. You can also clear the site data of your browser.
If you clear the site data without a copy, your log is gone. Cycle cannot get it back.