Last updated: June 16, 2026

Privacy Policy

Local data

SleepEstimate stores alarms, world clock city choices, and sleep history in your browser local storage. This data stays on your device unless you clear browser data or remove the app.

Notifications

If you enable alarm or timer notifications, your browser manages that permission. You can revoke it at any time in your browser settings.

Analytics and ads

SleepEstimate may add privacy-respecting analytics or advertising in the future. If that happens, this policy will be updated before those services are enabled.

Health information

SleepEstimate is a general planning tool, not medical advice. Sleep calculations are estimates based on sleep-cycle timing.