Privacy

Where your data lives

Everything you enter (wake times, sleep logs, check-ins, protocols, templates, Flow Block history) is saved on your device first, in your browser's local storage. That is why the app opens instantly and works offline. Without an account, nothing is transmitted to us and there is no server-side copy of your rhythm.

You can export a full copy to a file anytime with the export button in the Your data row on the ChronoMap. A file you hold outlives every account and every company.

If you sign in

Accounts are optional and free. When you sign in (with Google or an email link), your data is also backed up to your account so a lost phone or a cleared browser no longer means a lost history, and Pro keeps multiple devices in live sync.

The backup is stored with our database provider, Supabase, hosted in the United States (AWS US East), encrypted in transit and at rest, and protected by row-level security: only your signed-in account can read your rows. We hold your email address for sign-in and nothing else about you. We do not sell data, share it with advertisers, or mine it; the app's insights are computed on your device.

Signing out stops the backup and leaves your data on the device. To delete the server-side copy entirely, write to us (below) and we delete the account and every row with it; export first if you want to keep a file.

What we can see

If analytics are enabled on this site, we use Plausible, a cookieless, privacy-first counter. It tells us aggregate things like “how many people visited the pricing page”, never who you are. There are no cookies, no persistent identifiers, and no cross-site tracking. That is why you don't see a consent banner: there is nothing to consent to.

Not medical data, not medical advice

ChronoPersona is educational. It maps well-studied rhythms and never diagnoses. Nothing here replaces a clinician, so if you have sleep or health concerns, please see one.

Questions

Write to hello@chronopersona.io and a person reads it.