Opsin

Terms of Use

Last updated: July 22, 2026

These Terms of Use (the “Terms”) form a binding agreement between you and Opsin App, LLC (“Opsin,” “we,” “us,” or “our”) and govern your access to and use of the Opsin mobile application, our website, and the related software, features, and services we make available (together, the “Services”). Please read them carefully.

By downloading the app or otherwise using the Services, you agree to these Terms and to our Privacy Policy, which is incorporated here by reference. If you do not agree, do not use the Services. You also consent to receive these Terms, the Privacy Policy, and any notices, agreements, and disclosures from us electronically (e.g., through the app or by email) and you agree that electronic delivery satisfies any legal requirement that such communications be in writing.

1Changes to These Terms

We may revise these Terms from time to time. If we make material changes, we will take reasonable steps to let you know, such as by posting the updated Terms with a new “Last updated” date or providing notice through the Services. Changes take effect when posted unless we say otherwise, and your continued use of the Services after that point means you accept the revised Terms. If you do not agree to a change, your remedy is to stop using the Services.

2Who May Use the Services

The Services are intended only for individuals who are at least eighteen (18) years old. By using the Services, you represent that you are eighteen or older and are able to form a binding contract with us. The Services are not directed to children, and we do not knowingly collect information from anyone under eighteen. If we learn that we have done so in a way that applicable law does not permit, we will take reasonable steps to delete that information.

3What Opsin Is, and Is Not

Opsin offers personalized guidance relating to circadian rhythm, light exposure, sleep timing, jet-lag planning, and general wellness. To generate this guidance we may use information you provide, data from your device and its sensors, time-zone and travel information, and our own models and algorithms. The app processes your health, sleep, and location data on your device; this information is not transmitted to or stored by Opsin.

The Services are provided for informational and general wellness purposes only. Opsin is not a medical device, is not a provider of medical or mental-health care, and has not been evaluated, cleared, or approved by the U.S. Food and Drug Administration or any other regulator. Additional health-related disclaimers appear in Section 12.

4Your Account

The Opsin app does not require you to create an account with us, and we do not issue or store login credentials. If you connect the app to a service that has its own account or credentials (such as your Apple ID or Apple Health), that account is governed by, and managed through, the provider of that service, and you are responsible for it. Please review your device and connected-service settings to control the app’s permissions.

5License to Use the Services

Subject to your compliance with these Terms, we grant you a personal, limited, revocable, non-exclusive, non-transferable, and non-sublicensable license to download and use the Opsin app and to access the Services for your own personal, non-commercial use. This license does not transfer any ownership interest to you, and we reserve all rights not expressly granted.

6Our Intellectual Property

The Services, including their software, source and object code, algorithms, models, text, graphics, images, audio, user interfaces, and the selection, coordination, and arrangement of these elements (the “Opsin Materials”), are owned by Opsin or its licensors and are protected by copyright, trademark, patent, trade-secret, and other laws. Except as these Terms allow, you may not copy, modify, distribute, publicly display, translate, reverse engineer, decompile, disassemble, scrape, or use the Opsin Materials to train machine-learning or artificial-intelligence systems, except to the extent applicable law prohibits that restriction. The Opsin name, logos, and related marks belong to Opsin, and you may not use them without our prior written permission.

7Your Content and Information

The app processes the information you enter and the health and location data you permit it to use on your device, to provide your guidance; Opsin does not receive or store that information. If you send us information directly (e.g., your email address to join our waitlist, or feedback) you grant us a limited, non-exclusive license to use it for the purpose for which you provided it and as described in our Privacy Policy. You are responsible for the accuracy of what you provide.

8Rules of Use

You agree not to do any of the following, and not to help or encourage others to do them:

We may investigate suspected violations and may suspend or terminate access as described in Section 15.

9Connected Devices, Permissions, and Integrations

Some features rely on device permissions or third-party integrations—for example, notifications, alarms, location services, calendars, smart-lighting systems, or health platforms such as Apple Health and Apple Watch. You control which permissions you grant, though some features may not work without them. We do not control third-party devices, platforms, or data sources, and the data we receive from them may be delayed, incomplete, or inaccurate. We are not responsible for third-party products or services, or for outcomes such as device malfunctions, missed alarms, or unsafe conditions arising from them.

10Notifications, Alarms, and Scheduling Tools

The Services may offer reminders, alarms, notifications, prompts, streaks, and similar tools. These are conveniences only. We do not guarantee that they will be delivered or that they will be accurate, timely, or suitable for your situation, because delivery depends on your device, settings, connectivity, permissions, and other factors we do not control. You remain solely responsible for waking on time, meeting your schedule and obligations, and making any decision involving your safety, work, travel, or health.

11Subscriptions, Purchases, and Trials

Some features are offered for a fee through subscriptions, in-app purchases, or premium plans. If you buy one, you agree to pay the applicable fees and taxes. Subscriptions may renew automatically at the end of each term unless you cancel beforehand, and any free trial may convert to a paid subscription unless canceled before it ends. If you purchased through the Apple App Store or Google Play, you manage and cancel your subscription through that account. Apple processes all subscription payments through the App Store; Opsin does not receive or store your payment-card information. Deleting the app does not cancel it. Except where the law or applicable store rules require otherwise, fees are non-refundable. We may change or discontinue plans, features, trials, or pricing, subject to applicable law.

12Health, Wellness, and Medical Disclaimer

Opsin is a wellness product, not medical care. The Services do not diagnose, assess, treat, cure, monitor, or prevent any disease, disorder, or condition, and they are not a substitute for the advice or judgment of a qualified health professional. Consult a professional before making decisions that could affect your health, sleep, medication, or treatment, and never disregard or delay professional advice because of anything the Services provide. If you think you may have a medical emergency, contact emergency services immediately. The Services are not intended to diagnose or treat sleep, circadian, psychological, neurological, endocrine, or vision conditions, or to determine whether you are fit or safe to work, drive, fly, operate machinery, or perform any other safety-sensitive activity.

13No Guarantees; Individual Variability

Circadian, sleep, and light-exposure science continues to evolve. Our guidance consists of estimates and decision-support suggestions generated from the information you supply, device and sensor data, scientific literature, and our models. People respond differently to sleep timing, light, darkness, caffeine, travel, and schedule changes, and many factors we cannot observe (e.g., your health, medications, genetics, environment, and behavior) affect results. We do not promise any particular outcome, including improved sleep, reduced jet lag, greater alertness, better mood, or enhanced performance, and you should not treat our guidance as the sole basis for any important decision.

14Assumption of Risk

You use the Services at your own risk and are responsible for your own decisions and safety, and for the safety of others who may be affected by your actions. You accept all the risks that come with using the Services, whether or not they are known to you, and you agree to use your own judgment and to follow the laws, regulations, and safety requirements that apply to you.

15Suspension and Termination

We may suspend, restrict, or terminate your access to all or part of the Services at any time, with or without notice. This includes if we reasonably believe you have violated these Terms, if we are required to do so by law or a governmental or law-enforcement request, if you ask us to stop using the Services and remove the app, or if we discontinue or materially change the Services or encounter technical problems. We may also preserve and disclose information about you or your use of the Services where we reasonably believe it is necessary to comply with law or legal process, enforce these Terms, respond to claims that content violates the rights of others, prevent fraud or abuse, or protect the rights, property, or safety of Opsin, our users, or the public. If we bring an action to enforce these Terms and prevail, we may recover our reasonable attorneys’ fees and costs to the extent the law allows. We are not liable to you or any third party for suspending or terminating your access consistent with this section.

You may stop using the Services and remove the app at any time. If you stop using the Services or these Terms end for any reason, your right to use the Services stops immediately, and we will handle any personal information you provided to us, such as a waitlist email address, as described in our Privacy Policy. Sections that by their nature should continue will survive, as listed in the General section below.

16Disclaimer of Warranties

To the fullest extent permitted by law, the Services are provided on an “as is” and “as available” basis, without warranties of any kind, whether express, implied, or statutory. We disclaim the implied warranties of merchantability, fitness for a particular purpose, title, and non-infringement, as well as any warranties arising from a course of dealing or usage of trade. We do not warrant that the Services will be uninterrupted, timely, secure, accurate, complete, or error-free, that defects will be corrected, or that any output, such as a recommendation, schedule, alarm, or insight, will be accurate or appropriate for you. You are responsible for evaluating our guidance and deciding whether it fits your circumstances.

17Limitation of Liability

To the fullest extent permitted by law, neither Opsin nor its members, managers, officers, employees, contractors, agents, affiliates, or licensors will be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, lost data, loss of goodwill, business interruption, personal injury, illness, death, property damage, missed flights or meetings, fatigue, reduced alertness, or similar losses, arising out of or relating to your use of or inability to use the Services, even if we were advised such damages were possible.

Except where prohibited by law, our total liability for all claims arising out of or relating to the Services will not exceed the greater of (a) one hundred U.S. dollars ($100) or (b) the amounts you paid us for the Services in the twelve (12) months before the event giving rise to the claim. Some jurisdictions do not allow certain of these limitations, so parts of this section may not apply to you; in that case our liability is limited to the greatest extent the law permits.

18Indemnification

You agree to indemnify, defend, and hold harmless Opsin and its members, managers, officers, employees, agents, and affiliates from and against any claims, damages, losses, liabilities, and expenses (including reasonable attorneys’ fees) arising out of or relating to your use or misuse of the Services, Your Content, your violation of these Terms, or your violation of any law or the rights of any third party.

19Copyright Complaints (DMCA)

We respect the intellectual-property rights of others. If you believe material available through the Services infringes a copyright you own or control, you may send a written notice to our designated agent that includes: (1) your physical or electronic signature; (2) identification of the work claimed to be infringed; (3) identification of the material claimed to be infringing and information sufficient to locate it; (4) your contact information; (5) a statement that you have a good-faith belief the use is not authorized by the owner, its agent, or the law; and (6) a statement, under penalty of perjury, that your notice is accurate and that you are the owner or authorized to act for the owner. If you believe your material was removed by mistake, you may submit a counter-notification with the corresponding information required by the Digital Millennium Copyright Act. We may remove material and terminate repeat infringers in appropriate circumstances.

Designated agent: Copyright Agent, Opsin App, LLC, 21750 Hardy Oak Blvd, Suite 104 #616929, San Antonio, Texas 78258; privacy@opsinapp.com.

20App Store Terms

If you obtain the app from the Apple App Store or Google Play (each, an “App Store”), your use is also subject to that App Store’s terms, which control over these Terms to the extent of any conflict with respect to the app. The following apply if you obtained the app from the Apple App Store: this agreement is between you and Opsin, not Apple; Apple has no obligation to provide maintenance or support; to the extent permitted by law, Apple has no warranty obligation and is not responsible for addressing any claims relating to the app, including product-liability, legal, regulatory, or intellectual-property claims; you represent that you are not located in an embargoed country or on a U.S. Government restricted-party list; and Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.

21Dispute Resolution; Binding Arbitration

Please read this section carefully; it affects how disputes are resolved. Except for (a) individual claims in small-claims court and (b) claims for injunctive or equitable relief relating to intellectual property or unauthorized use of the Services, you and Opsin agree that any dispute arising out of or relating to these Terms or the Services will be resolved by binding, individual arbitration administered by the American Arbitration Association under its then-current rules, rather than in court. The Federal Arbitration Act governs this section.

Arbitration will be conducted on an individual basis only. Neither you nor Opsin may bring a claim as a plaintiff or class member in a class or representative proceeding, and the arbitrator may not consolidate claims or preside over any class or representative proceeding. You may opt out of arbitration by sending written notice to privacy@opsinapp.com within thirty (30) days of first accepting these Terms; if you opt out, Section 22 governs your disputes.

22Governing Law; Venue; Jury Waiver; Time to Sue

These Terms and any dispute relating to them or the Services are governed by the laws of the State of Texas, without regard to conflict-of-laws principles. Subject to Section 21, any dispute not resolved by arbitration must be brought exclusively in the state or federal courts located in the Western District of Texas, and you consent to the jurisdiction of those courts and waive any objection to venue. To the fullest extent permitted by law, you waive any right to a jury trial in any proceeding arising out of or relating to these Terms or the Services; this waiver does not apply where it is prohibited by law. Any claim must be brought within one (1) year after it accrues, or it is permanently barred to the fullest extent allowed by law. Any dispute will be brought only in your individual capacity and not as part of any class or representative proceeding.

23Changes to the Services

We may modify, suspend, or discontinue all or part of the Services at any time, with or without notice, including by adding or removing features, changing our models or recommendations, or limiting availability in certain places. We are not liable for any change to or unavailability of the Services.

24Feedback

If you send us feedback or suggestions, you agree that we may use them without restriction and without any obligation to you, and that such feedback is not confidential.

25General

These Terms, together with the Privacy Policy (including the Consumer Health Data Privacy Policy) and any terms incorporated by reference, are the entire agreement between you and Opsin regarding the Services and supersede any prior understanding on that subject. If any provision is held unenforceable, it will be modified to the minimum extent necessary or severed, and the remaining provisions will stay in effect. Our failure to enforce a provision is not a waiver of it. You may not assign these Terms without our prior written consent; we may assign them freely. Except for Apple as described in the App Store Terms section, these Terms do not create any third-party beneficiary rights. We are not liable for delays or failures caused by events beyond our reasonable control. We may give you notice through the Services or, if you have given it to us, your email address. You may not export or use the Services in violation of U.S. or other applicable export and sanctions laws. The following sections survive termination: 6, 7, 12, 13, 14, 16, 17, 18, 19, 21, 22, 24, and this Section 25.

26Contact Us

Questions about these Terms may be sent to Opsin App, LLC at privacy@opsinapp.com, or Opsin App LLC, 21750 Hardy Oak Blvd, Suite 104 #616929, San Antonio, Texas 78258.