Terms of Service & Liability Waiver

Last updated: September 24, 2026

These terms are an agreement between you and the individual developer of Relix, based in Illinois (“we,” “us”). By downloading or using Relix, you agree to them.

1. Informational Use Only

By using Relix, you acknowledge that all content — including caffeine half-life estimates, in-system projections, and activity-level visualizations — is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Caffeine metabolism varies widely between individuals; what Relix displays is a population-model approximation, not a measurement of your blood.

2. Eligibility

Relix is intended for adults 18 and older and is not designed for children. If you are pregnant or breastfeeding, have a heart condition, high blood pressure, or an anxiety disorder, or take medication that interacts with caffeine, consult a healthcare professional about your intake rather than relying on this app.

3. Subscription & Payment

Relix requires payment before you can use the app — there is no free version. Depending on the plan you choose at checkout, you will be charged either a recurring subscription fee (billed monthly or annually) that automatically renews at the end of each billing period until you cancel, or a one-time fee for lifetime access with no recurring charges.

All payments are processed by the Apple App Store. We do not receive or store your payment card information. Your subscription status is verified and maintained using Superwall (Superwall Ventures, Inc.), our onboarding and subscription infrastructure provider.

You can view, manage, or cancel a subscription at any time in your Apple ID account settings. To avoid being charged for the next billing period, cancel at least 24 hours before the renewal date. Refunds are issued solely at the discretion of Apple under its own refund policy — Relix cannot process refunds directly. If we change subscription pricing, the new price applies starting with your next renewal and, where required, you will be notified in advance.

“Lifetime access” means access to Relix for as long as we continue to offer and support the app — not for the lifetime of the purchaser. It is a one-time purchase of the app as it exists, and does not guarantee future updates, new features, or compatibility with future versions of iOS or future devices.

4. Assumption of Risk

You agree that these calculations are estimates, not biological facts. Relix estimates how much caffeine may remain in your system at a given time — including at your planned bedtime — using the information you provide and a mathematical model, not a measurement of your blood. It should never be used to determine how much caffeine is safe for you to consume, for judging whether you are alert enough to drive or operate machinery, or for managing caffeine alongside a sleep disorder, medication, or any medical condition.

5. Disclaimers & Limitation of Liability

Relix is provided “as is” and “as available.” To the maximum extent permitted by law, we disclaim all warranties, express or implied, including warranties of accuracy, merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the app’s estimates will be accurate for you or that the app will be uninterrupted or error-free.

To the maximum extent permitted by law, we are not liable for any indirect, incidental, special, consequential, or punitive damages, or for any health-related harm resulting from reliance on the app’s estimates. Our total liability for any claim relating to Relix is limited to the greater of the amount you paid for Relix in the 12 months before the claim arose or US$50.

Some jurisdictions do not allow certain warranties to be excluded or liability to be limited, so some of the above may not apply to you. Nothing in these terms limits liability that cannot be limited under applicable law, including liability for gross negligence or willful misconduct.

6. Indemnification

You agree to indemnify and hold us harmless from third-party claims, and related reasonable legal fees, arising from your breach of these terms or your misuse of the app. This does not apply to claims caused by our own wrongful conduct.

7. Medical Emergencies

This app is not an emergency service. If you or someone else is experiencing a medical emergency — including suspected caffeine overdose, chest pain, irregular heartbeat, repeated vomiting, confusion, seizure, difficulty breathing, or loss of consciousness — call 911 (or your local emergency number) immediately. Do not rely on Relix to assess whether emergency care is needed.

Relix does not diagnose, treat, cure, or prevent any disease. It is for informational purposes only and is not a medical device. Estimates are educational approximations based on general caffeine metabolism models — not clinical measurements. Always consult a qualified healthcare professional before making any decisions about your caffeine intake.

8. Changes to These Terms

We may update these terms from time to time. The current version will always be posted here with its effective date. Continued use of the app after changes constitutes acceptance of the revised terms.

9. Discontinuation & Termination

We may stop offering, updating, or supporting Relix. If we discontinue the app, we will give at least 30 days’ notice on this website or in the app where reasonably possible. Because your caffeine log is stored on your device, an already-installed copy may continue to work after support ends, but we cannot guarantee it will keep working as iOS and devices change.

We may suspend or terminate your access if you materially breach these terms, obtain access through fraud, or reverse a payment through a chargeback. Refunds, where available, are handled by Apple under its own policy.

10. License

Relix is licensed, not sold, to you under Apple’s standard Licensed Application End User License Agreement. These terms supplement that agreement; where they conflict on a matter it covers, Apple’s agreement controls.

11. Governing Law

These terms are governed by the laws of the State of Illinois, USA, without regard to its conflict-of-law rules. Any dispute will be brought in the state or federal courts located in Illinois, except that either party may bring an individual claim in small-claims court. If you live in a country or state whose consumer-protection laws give you the right to bring claims in your local courts or under your local law, nothing here takes that right away.

12. General

If any part of these terms is found unenforceable, that part will be limited or removed to the minimum extent necessary, and the rest will remain in full effect. These terms, together with our Privacy Policy and Apple’s License Agreement, are the entire agreement between you and us about Relix. Our failure to enforce any provision is not a waiver of it. We may transfer these terms to a successor who takes over Relix; you may not transfer them without our consent.

Questions? support@relixhealth.com