Terms of Use

Last updated: May 6, 2026

Please read these Terms of Use carefully before using the JetLag App (the "App") and its associated services (the "Services"). By using the App, you agree to these Terms. If you do not agree, do not use the App.

1. Acceptance of Terms

By accessing or using the Services, you confirm that you can form a binding contract with JetLag App ("we," "us," or "our") and that you will comply with these Terms and all applicable laws. If you are using the Services on behalf of a company or other legal entity, you represent that you have the authority to bind that entity to these Terms.

2. Anonymous Usage & Privacy

Unlike many other services, JetLag App is designed to minimize data collection and prioritize your privacy. We utilize automatic anonymous authorization.

  • No Accounts Required: You do not need to create an account, provide an email address, or set a password to use the core features of the App.
  • Data Storage: Your adaptation plans and flight data are linked anonymously to your device. We do not sell your personal data.
  • No Passwords to Lose: Because we do not use passwords, you are solely responsible for securing physical access to your device.

3. AI-Generated Guidance

JetLag App provides personalized circadian adaptation plans (including sleep, light, caffeine, and melatonin recommendations) generated using advanced artificial intelligence, including algorithms powered by OpenAI.

  • You acknowledge that AI models may occasionally produce unpredictable or suboptimal schedules.
  • The guidance is generated dynamically based on your flight itinerary and is subject to the inherent limitations of predictive language models and circadian algorithms.

4. Medical Disclaimer (Important)

The App does not provide medical advice, diagnosis, or treatment.

The guidance provided by the App is informational and decision-support guidance based on general circadian science. It is not a substitute for professional medical judgment, training, or healthcare care.

  • Not a cure: The Services are not intended to diagnose, cure, mitigate, treat, or prevent any sleep disorder or medical condition.
  • Consult a doctor: Always consult your physician before altering your sleep schedule, caffeine intake, or taking supplements such as melatonin, especially if you have pre-existing health conditions or are taking medication.
  • No safety guarantees: Do not rely on the App to determine if you are fit, alert, or safe to perform any specific activity. Do not use the App while driving, operating heavy machinery, or engaging in safety-critical tasks.

5. Intellectual Property

All content, algorithms, text, graphics, user interfaces, trademarks, logos, and computer code contained in the App are owned, controlled, or licensed by us and are protected by intellectual property laws. You may not copy, reproduce, republish, or distribute any part of the App without our express prior written consent.

6. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, JETLAG APP SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS OR REVENUES, WHETHER INCURRED DIRECTLY OR INDIRECTLY, OR ANY LOSS OF DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES, RESULTING FROM (A) YOUR ACCESS TO OR USE OF OR INABILITY TO ACCESS OR USE THE SERVICES; OR (B) ANY GUIDANCE PROVIDED BY THE APP.

IN NO EVENT SHALL OUR AGGREGATE LIABILITY FOR ALL CLAIMS RELATING TO THE SERVICES EXCEED THE GREATER OF $100 USD OR THE AMOUNT YOU PAID US IN THE PAST 12 MONTHS.

7. Governing Law

These Terms shall be governed by the laws of the United States, without respect to its conflict of laws principles. Any legal action or proceeding arising under these Terms will be brought exclusively in the federal or state courts located within the United States, and you hereby irrevocably consent to the personal jurisdiction and venue therein.

8. Changes to Terms

We may modify these Terms at any time. We will indicate the date of the latest update at the top of this document. Your continued use of the App after changes are posted constitutes your acceptance of the revised Terms.

If you have any questions about these Terms, please contact support through the App.