Clio Daye — Cycle tracking. Privately.

Your health data belongs to you.

Clio Daye is a menstrual cycle tracker built on one principle: everything stays on your device. No accounts. No cloud sync. No analytics. No third-party SDKs. There is no server that can be breached, no company that can sell your data.

Log in seconds

Period, flow, symptoms, mood — captured before you put your phone down.

Honest predictions

Ranges based on your actual cycle history, not a 28-day average that doesn't fit you.

Spot patterns

Insights about your symptoms over time, with links to trusted health resources.

Face ID protected

Face ID, Touch ID, or PIN. Your data is locked, and you can delete it all in one tap.

Private by design, not by policy.

Most apps promise privacy. Clio Daye enforces it architecturally — there's no server to send your data to. Read the full privacy policy or review the source code.

Read our analysis: Your Period Tracker Is Probably Selling Your Data →