How your information is handled

Last updated: July 24, 2026

Information you choose to provide

Calculator inputs such as bedtime, wake-up time, sleep duration, and habit answers are used to produce results. The free calculator works without an account. Some preferences and saved results may remain in your browser storage.

Google sign-in

When you sign in, the site receives the Google account identifier and basic profile information needed to identify your account. The sign-in credential is used to verify access to purchased content.

Payments and access

Payments are processed by PayPal. Payment card or bank details are entered with PayPal, not on Sleep Calculator. We retain order and access details needed to provide the purchased digital product for its stated access period.

Service operation

Our hosting and infrastructure providers may process standard technical information such as request time, browser type, IP address, and error logs to deliver and protect the service.

Your choices

You can use the free calculator without signing in, clear saved browser data through your browser settings, and request help with account access through support@sleepcalculator.life.