Privacy Policy

The short version

• You do not need an account to use these sleep tools.
• Your sleep log entries (bedtimes, wake times, sleep latency, awakenings) are processed strictly in your browser and stored in your device's local storage.
• We never transmit your sleep logs, sleep efficiency scores, or schedule data to our servers.
• There are no third-party advertising trackers or commercial data sales.

What stays on your device

When you use the Sleep Efficiency Calculator, the values you enter are saved to your browser's localStorage under the key sleep:v1. This ensures your multi-night log is preserved between visits. You can clear this data at any time by clicking “Reset log” or clearing your browser storage.

Anonymous usage analytics

To help us understand whether our tools are functional and useful, we may measure aggregated anonymous actions (such as page views or tool interactions). These events never contain your sleep times, efficiency numbers, or any personal identifiers.

Informational self-help only

Sleep Tools provides informational self-help resources based on published clinical literature. It is not a medical device, does not provide clinical diagnoses, and is not a substitute for professional medical care.