Hypnogram
Last updated: July 20, 2026
These Terms of Service ("Terms") govern your use of the Hypnogram mobile application (the "App"). The App is operated by John Arthur Williams ("we," "us," or "our"). By downloading or using the App, you agree to these Terms. If you do not agree, please do not use the App.
Hypnogram is a personal sleep tracking tool. It reads sleep data you connect (from Apple Health or the App's optional microphone tracking), lets you log nightly habits, and calculates statistical associations between those habits and your sleep quality. All processing occurs on your device.
Hypnogram is not a medical device and does not provide medical advice, diagnosis, or treatment. The insights it surfaces are statistical associations in your own data and are for informational purposes only. They are not a substitute for professional medical judgment. Always consult a qualified healthcare professional, such as a physician, regarding any questions about your health, sleep, or a medical condition, and before making changes based on anything the App shows you. Never disregard or delay seeking professional medical advice because of something you read in the App.
You must be at least 18 years old, or the age of majority in your jurisdiction, to use the App. The App is intended for adults tracking their own sleep.
Hypnogram offers optional premium features through an auto-renewing subscription:
Any unused portion of a free trial is forfeited when you purchase a subscription, where applicable.
Your sleep and habit data is stored on your device, as described in our Privacy Policy. You are responsible for maintaining your device and for backing up or exporting your data if you wish to preserve it, since deleting the App deletes its data. You agree to use the App only for lawful, personal purposes and not to misuse, reverse engineer, or interfere with the App except as permitted by law.
The App, including its software, design, text, and branding, is owned by us and protected by intellectual property laws. We grant you a limited, non-exclusive, non-transferable, revocable license to use the App for your personal, non-commercial use, subject to these Terms and the App Store's terms. Your data remains yours.
The App is provided "as is" and "as available," without warranties of any kind, whether express or implied, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the App will be uninterrupted, error-free, or that any insight, estimate, or measurement it produces will be accurate. Sleep estimates — particularly from microphone tracking — are approximations.
To the maximum extent permitted by law, we will not be liable for any indirect, incidental, special, consequential, or punitive damages, or any loss of data, arising out of or relating to your use of the App. To the maximum extent permitted by law, our total liability for any claim relating to the App will not exceed the greater of the amount you paid us for the App in the twelve months before the claim, or ten U.S. dollars (US$10).
We may modify or discontinue the App or any feature at any time. We may also update these Terms; when we do, we will revise the "Last updated" date above, and material changes will be communicated through the App or this page. Your continued use of the App after changes take effect constitutes acceptance of the updated Terms.
These Terms are governed by the laws of the State of Ohio, United States, without regard to its conflict-of-laws principles. Any dispute arising under these Terms will be subject to the exclusive jurisdiction of the state and federal courts located in Ohio, except where applicable law provides otherwise.
Questions about these Terms? Contact us at support@hypnogramsleep.com, or by mail at:
John Arthur Williams
311 Elm Street, Ste 270 PMB 1573
Cincinnati, OH 45202
United States