Contact Us
Have a question, feedback, or spotted an issue? We would love to hear from you.
About This Site
SleepTimingGuide.com is a free online sleep cycle calculator that helps you find the best bedtime, wake-up time, or nap schedule based on natural 90-minute sleep cycles. The tool runs entirely in your browser — no account or sign-up required.
Get in Touch
For any questions, feedback, accessibility concerns, or content issues, please email us directly:
What We Can Help With
- General questions about how the calculator works
- Feedback or suggestions for improving the tool
- Reporting a bug or technical issue
- Accessibility concerns or requests
- Privacy or data inquiries (see our Privacy Policy)
- Content or accuracy concerns
Response Time
We aim to respond to all inquiries within 1 to 2 business days. We appreciate your patience and read every message we receive.
Privacy Requests
If you are submitting a request related to your privacy rights under GDPR, CCPA, or another applicable law, please indicate that clearly in your email so we can route it appropriately. See our Privacy Policy for details on your rights.