Ren

Terms of Service

Last updated: July 20, 2026

Please read these Terms of Service ("Terms") carefully. They are a binding contract between you and Front Back Labs, Inc. ("Ren," "we," "us," or "our") and govern your use of the Ren mobile apps, website at ren.so, and related services (together, the "Service").

By creating an account, downloading the app, or using the Service, you agree to these Terms and to our Privacy Policy. If you do not agree, do not use the Service.

Important health notice. Ren is a consumer wellness tool for self-directed experimentation. It is not a medical device, not a healthcare provider, and not a substitute for professional medical advice, diagnosis, or treatment. See Section 4 before you begin any experiment, supplement, or protocol.

Arbitration notice. Section 16 requires most disputes to be resolved through binding individual arbitration and waives your right to a jury trial and to participate in a class action. Please read it carefully.

1. Eligibility

You must be at least 18 years old and able to form a binding contract to use the Service. By using the Service you represent that you meet these requirements and that the information you provide is accurate. The Service is intended for use in jurisdictions where it is lawfully offered.

2. Your account

You are responsible for safeguarding your account credentials and for all activity under your account. Notify us promptly at support@ren.so if you suspect unauthorized use. You may not share your account, impersonate others, or provide false information. We may suspend or terminate accounts that violate these Terms (see Section 14).

3. What the Service does

Ren helps you design and run structured "n-of-1" experiments on your own health: defining a hypothesis, selecting a protocol, tracking adherence and outcomes, connecting wearables and health platforms, and interpreting results — including with the help of AI tools. The Service may also let you purchase supplements or related products (see Section 8).

The Service provides information and software tools only. Any decisions you make about your health, supplements, diet, exercise, or medical care are your own.

4. Health disclaimer and assumption of risk

This section is the most important part of these Terms.

  • Not medical advice. Ren does not provide medical advice and is not a substitute for a physician, pharmacist, or other licensed healthcare professional. Content, experiment suggestions, supplement information, and AI-generated insights are for informational and educational purposes only. Ren does not diagnose, treat, cure, prevent, or monitor any disease or condition.
  • Consult a professional first. Always seek the advice of a qualified healthcare provider before starting, stopping, or changing any supplement, medication, diet, exercise program, or health protocol — especially if you are pregnant or nursing, have a medical condition, or take prescription medication. Never disregard professional medical advice or delay seeking it because of something you read or generated in the Service.
  • Emergencies. The Service is not for medical emergencies. If you think you may have a medical emergency, call 911 or your local emergency number immediately.
  • Supplements carry risk. Dietary supplements are not reviewed by the FDA for safety or efficacy the way drugs are. They can have side effects, interact with medications, and affect people differently. You are responsible for researching any product you take, reading its label, and confirming it is appropriate for you.
  • Self-experimentation is at your own risk. n-of-1 experimentation involves changing variables in your own life and observing the results. You voluntarily assume all risks associated with experiments you design or run using the Service, and you are solely responsible for your choices and their outcomes.
  • No guaranteed results. Individual results vary. We make no promise that any experiment, protocol, or insight will produce any particular health outcome.

5. AI features

The Service uses artificial intelligence to help you design experiments and interpret data. AI output can be incomplete, inaccurate, or not suitable for your situation, and is not medical advice. Use judgment, verify important information, and consult a professional before acting on it. Your use of AI features is also subject to Section 4.

6. Connected devices and data

You may connect wearables, health platforms, and devices (e.g., Apple Health, Oura, Whoop, Fitbit) to the Service. Your use of those third-party products is governed by their own terms and privacy policies. We are not responsible for the accuracy, availability, or practices of third-party devices or services, and connectivity may be interrupted or discontinued. You control which sources you connect and may disconnect them at any time. How we handle connected data is described in our Privacy Policy.

7. Acceptable use

You agree not to:

  • use the Service for any unlawful purpose or in violation of these Terms;
  • provide health data about anyone other than yourself, or run experiments on another person through your account;
  • reverse engineer, scrape, or attempt to extract source code, except where permitted by law;
  • interfere with, disrupt, or overload the Service or its security features;
  • upload malicious code or attempt to gain unauthorized access to any system or account;
  • resell, sublicense, or commercially exploit the Service without our written permission; or
  • misrepresent the Service's outputs as medical advice to others.

8. Purchases, subscriptions, and supplements

8.1 Subscriptions

Some features may require a paid subscription. Pricing, billing frequency, and features are shown at the point of purchase.

  • App store billing. If you subscribe through the Apple App Store, payment is charged to your store account, and subscriptions auto-renew until canceled. You manage and cancel renewals in your store account settings, subject to the store's terms; we do not control store billing.
  • Direct billing. If you subscribe directly through us, you authorize us (via our payment processor) to charge your payment method on a recurring basis until you cancel. You can cancel from your account settings.
  • Cancellation and refunds. Cancellation stops future renewals; it does not retroactively refund the current period unless required by law or store policy. App store purchases are subject to the store's refund policies.

8.2 Supplements and physical products

If the Service offers supplements or other physical products for purchase:

  • Products are sold by us and/or fulfilled by third-party providers. Pricing, availability, taxes, and shipping are shown at checkout.
  • You are responsible for reviewing each product's label, ingredients, and suitability for you before ordering and before use, consistent with Section 4.
  • We do not guarantee that any product is appropriate for your health needs or will produce any particular result.
  • Returns, refunds, shipping timelines, and damaged-item handling follow the policy presented at checkout or in the app. Title and risk of loss for physical goods pass to you on delivery to the carrier unless stated otherwise.
  • Statements about supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease.

9. Your content and license to us

You retain ownership of the content and data you submit ("Your Content"). You grant us a worldwide, non-exclusive, royalty-free license to host, store, process, and display Your Content solely to operate and improve the Service for you, as described in our Privacy Policy. We do not sell Your Content and do not use your personal health data to train third-party AI models. You are responsible for the accuracy and legality of Your Content.

10. Our intellectual property

The Service, including its software, design, text, graphics, and trademarks, is owned by Ren or its licensors and protected by intellectual property laws. We grant you a limited, personal, non-transferable, non-exclusive, revocable license to use the Service for your own personal, non-commercial use, subject to these Terms. All rights not expressly granted are reserved.

11. Third-party services and links

The Service may integrate with or link to third-party products and websites. We do not control and are not responsible for them, and their inclusion is not an endorsement. Your dealings with third parties are between you and them.

12. Disclaimers of warranties

To the fullest extent permitted by law, the Service is provided "as is" and "as available," without warranties of any kind, express or implied, including implied warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement. We do not warrant that the Service will be uninterrupted, error-free, secure, or that any data, insight, or result will be accurate or reliable. This Section does not limit any warranty that cannot be excluded under applicable law.

13. Limitation of liability

To the fullest extent permitted by law:

  • Ren and its officers, employees, and agents will not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, data, goodwill, or health outcomes, arising out of or relating to the Service, even if advised of the possibility.
  • Ren's total aggregate liability for all claims relating to the Service will not exceed the greater of (a) the amount you paid us in the twelve (12) months before the event giving rise to the claim, or (b) one hundred U.S. dollars ($100).

Some jurisdictions do not allow certain limitations, so some of the above may not apply to you. Nothing in these Terms limits liability that cannot be limited by law (such as for gross negligence, willful misconduct, or personal injury where applicable).

14. Suspension and termination

You may stop using the Service and delete your account at any time. We may suspend or terminate your access if you violate these Terms, if required by law, or to protect the Service or other users. On termination, your license to use the Service ends; Sections that by their nature should survive (including 4, 9–13, 15–17) will survive. Data handling after termination is described in our Privacy Policy.

15. Indemnification

To the extent permitted by law, you agree to indemnify and hold harmless Ren and its officers, employees, and agents from claims, damages, and expenses (including reasonable legal fees) arising from your misuse of the Service, your violation of these Terms, or your violation of any law or third-party right.

16. Dispute resolution; arbitration; class waiver

Please read this Section carefully — it affects your legal rights.

  • Informal resolution first. Before filing a claim, you agree to contact us at support@ren.so and try to resolve the dispute informally for at least 30 days.
  • Binding arbitration. If we cannot resolve it, any dispute relating to the Service or these Terms will be resolved by binding individual arbitration administered by a recognized arbitration provider under its consumer rules, rather than in court — except that either party may bring an individual claim in small-claims court, and either party may seek injunctive relief for intellectual-property misuse.
  • Class action waiver. Disputes will be conducted only on an individual basis; you and Ren waive the right to participate in a class, collective, or representative action.
  • Opt-out. You may opt out of arbitration within 30 days of first accepting these Terms by emailing support@ren.so with your name and account email.
  • Governing law. These Terms are governed by the laws of the State of New York, without regard to conflict-of-laws rules. Where arbitration does not apply, the state and federal courts located in New York County, New York will have exclusive jurisdiction.

17. General

  • Changes to these Terms. We may update these Terms from time to time. If changes are material, we will notify you through the Service or by email before they take effect. Continued use after changes take effect means you accept them.
  • Apple and Google. If you use the app via the Apple App Store or Google Play, you also agree to that store's applicable terms. The store is not responsible for the Service or for support, and is a third-party beneficiary of these Terms to the extent the store's rules require.
  • Entire agreement. These Terms and the documents referenced in them are the entire agreement between you and Ren regarding the Service.
  • Severability and waiver. If any provision is unenforceable, the rest remains in effect. Our failure to enforce a provision is not a waiver.
  • Assignment. You may not assign these Terms without our consent; we may assign them in connection with a merger, acquisition, or sale of assets.

18. Contact

Email: support@ren.so

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