Terms of Service

1. Agreement to these terms

These Terms of Service ("Terms") form a binding agreement between you and Ratiō ("Ratiō," "we," "us," or "our"). They govern your use of the Ratiō mobile application for iOS, the ratiohealthapp.com website, our waitlist, and any related features and services (together, the "Services").

By downloading, installing, or using the Ratiō app, joining our waitlist, or otherwise using the Services, you agree to these Terms and to our Privacy Policy, which is incorporated into these Terms by reference. If you do not agree to these Terms, do not use the Services.

These Terms also serve as the End User License Agreement ("EULA") for the Ratiō app distributed through the Apple App Store. Section 13 contains additional terms required by Apple that apply specifically to the App Store version of the app, and those terms control over any conflicting provision elsewhere in these Terms.

2. Who can use Ratiō

You may use the Services only if you can form a binding contract with us and only in compliance with these Terms and all applicable laws.

• Minimum age: You must be at least 13 years old, or the minimum age of digital consent in your country if that age is higher (for example, 16 in parts of the EEA). Ratiō is not directed to children under 13, and we do not knowingly allow them to create accounts.
• Minors: If you are between the applicable minimum age and the age of majority where you live, you may use Ratiō only with the involvement and consent of a parent or legal guardian who agrees to these Terms on your behalf and accepts responsibility for your use.
• Prior removal: You may not use the Services if we have previously suspended or removed you from them.
• Legal compliance: You represent and warrant that you are not located in a country subject to a U.S. Government embargo or designated by the U.S. Government as a "terrorist supporting" country, and that you are not listed on any U.S. Government list of prohibited or restricted parties.

3. Your account

Some features require an account, which you can create with an email address and password or through Sign in with Apple. You agree to:

• Provide accurate, current information and keep it up to date.
• Keep your credentials confidential and not share your account with anyone else.
• Accept responsibility for all activity that occurs under your account.
• Notify us promptly at info@ratiohealthapp.com if you suspect unauthorized access to your account.

Ratiō calculates your calorie and macronutrient targets from the profile information you provide — including age, sex, height, weight, activity level, and goals. These targets are only as reliable as the information you enter, and it is your responsibility to keep that information accurate.

4. License to use Ratiō

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to download and use one copy of the Ratiō app for your personal, non-commercial use on an Apple-branded product that you own or control, as permitted by the Usage Rules set out in the Apple Media Services Terms and Conditions. This license does not grant you any ownership rights in the Services.

Except as expressly permitted by these Terms or by applicable law that cannot be waived, you may not:

• Copy, modify, adapt, translate, or create derivative works of the app or any part of the Services.
• Reverse engineer, decompile, or disassemble the app, or attempt to derive its source code or underlying models.
• Rent, lease, lend, sell, sublicense, or otherwise redistribute the app or your account.
• Remove, obscure, or alter any copyright, trademark, or other proprietary notice.
• Use the Services, or any output or data obtained from them, to develop, train, or improve a competing product, service, or machine-learning model.
• Access the Services through automated means — including scraping, crawling, or bulk extraction — or otherwise exceed reasonable usage limits.

5. Subscriptions, free trials & billing

Some Ratiō features are offered through an auto-renewing subscription purchased as an in-app purchase through the Apple App Store. The name, duration, price, and included features of each subscription plan are disclosed in the app on the purchase screen before you confirm your purchase, and prices may vary by region and currency.

Payment and automatic renewal

• Payment is charged to your Apple ID account at confirmation of purchase.
• Your subscription automatically renews for the same term at the then-current price unless auto-renew is turned off at least 24 hours before the end of the current period.
• Your Apple ID account is charged for renewal within 24 hours prior to the end of the current period.
• You can manage your subscription and turn off auto-renewal after purchase in your device's Settings → [your name] → Subscriptions, or through the App Store.
• Deleting the Ratiō app or your Ratiō account does not cancel your subscription. You must cancel through your Apple ID subscription settings to stop future charges.

Free trials

• Where we offer a free trial, its length and terms are disclosed at signup. Unless you turn off auto-renew at least 24 hours before the trial ends, the trial automatically converts to a paid subscription and your Apple ID account is charged.
• Any unused portion of a free trial period is forfeited when you purchase a subscription.
• Free trials are limited to one per user or Apple ID unless we state otherwise, and we may modify or withdraw a trial offer at any time before you accept it.

Cancellation, refunds, and price changes

• Cancellation takes effect at the end of your current billing period. You keep access to paid features until then, and no cancellation of the current subscription is allowed during an active subscription period.
• Except where required by law, payments are non-refundable and we do not provide refunds or credits for partial periods, unused time, or features you did not use.
• All purchases are processed by Apple, not by Ratiō. We do not receive your payment details and cannot issue refunds directly. Refund requests are handled by Apple under its own policies at reportaproblem.apple.com.
• We may change subscription prices. Price changes apply from your next renewal, and Apple will notify you in advance and, where required, obtain your consent before charging a changed price. If you do not agree to a new price, you can turn off auto-renewal before it takes effect.
• Prices are shown inclusive or exclusive of taxes as required by your jurisdiction; you are responsible for any applicable taxes not collected by Apple.

6. Health & medical disclaimer

• Informational only. Calorie targets, macronutrient targets, and nutrition estimates are generated from general formulas and AI analysis. They are not based on a clinical assessment of you and should not be treated as a personalized medical or dietary prescription.
• Talk to a professional first. Consult a physician or registered dietitian before starting any diet, weight-loss, or exercise program — particularly if you are pregnant or nursing, under 18, elderly, or living with a medical condition such as diabetes, cardiovascular disease, kidney disease, or an eating disorder, or if you take medication that interacts with diet.
• Never delay care. Do not disregard, avoid, or delay obtaining professional medical advice because of anything you read or see in Ratiō.
• Allergies and medically required diets. Ratiō's photo analysis can misidentify ingredients and cannot detect allergens, cross-contamination, or how food was prepared. Do not rely on Ratiō to make decisions about food allergies, intolerances, or a medically required diet. Always verify ingredients directly with the person or establishment that prepared your food.
• Disordered eating. Calorie and macro tracking is not appropriate for everyone. If you have, are recovering from, or are at risk of an eating disorder, or if tracking becomes distressing or compulsive, please stop using Ratiō and speak with a qualified professional. In the U.S., you can find resources through the National Eating Disorders Association at nationaleatingdisorders.org, or reach the 988 Suicide & Crisis Lifeline by calling or texting 988.
• Emergencies. If you think you may have a medical emergency, call 911 or your local emergency number immediately.
• No guaranteed results. Individual results vary based on many factors outside our control. We do not promise or guarantee weight loss, body composition change, or any other health outcome from using Ratiō.

7. AI estimates & accuracy

Ratiō uses artificial intelligence to identify foods in your photos, estimate portion sizes, and calculate nutrition figures, cross-referenced against a nutrition database. These figures are estimates, not measurements. By using Ratiō you acknowledge that:

• Accuracy varies with photo quality, lighting, camera angle, plating, and how much of the food is visible. Mixed dishes, sauces, hidden oils and fats, and recipe variation are inherently difficult to estimate from an image.
• Nutrition data is drawn in part from third-party and public sources that may contain errors or become outdated. We do not warrant that any specific figure is accurate.
• You can and should review and adjust results in the app when you know a figure is wrong. You are responsible for the decisions you make based on Ratiō's output.
• Examples shown on our website or in marketing materials illustrate Ratiō's output format. They are not a guarantee of the accuracy you will experience with your own meals.
• Features may change, and features labeled beta, preview, or early access are provided "as is" and may be modified or discontinued at any time.

8. Your content

"User Content" means anything you submit to the Services — food photos, meal entries, weight check-ins, notes, profile details, and messages you send us.

• You own your content. These Terms do not transfer ownership of your User Content to us.
• The license you give us. You grant Ratiō a limited, worldwide, non-exclusive, royalty-free license to host, store, reproduce, transmit, and process your User Content solely to operate and provide the Services to you — for example, sending a food photo to our AI analysis provider to identify it, and displaying your meal history back to you.
• Limits on that license. We do not use your food photos or health data for advertising, marketing, or use-based data mining, and we do not sell them. This license ends when you delete the relevant content or your account, subject to the retention periods described in our Privacy Policy.
• Your representations. You represent that you have the rights necessary to submit your User Content, that it does not infringe anyone's rights or violate any law, and that it does not contain another person's personal information or image without their consent.
• Feedback. If you send us suggestions, ideas, or feature requests, you grant us an unrestricted, perpetual, royalty-free right to use them without obligation or compensation to you.

How we handle your data — including food photos, HealthKit data, and account deletion — is described in full in our Privacy Policy.

9. Acceptable use

When using the Services, you agree not to:

• Use the Services for any unlawful purpose or in violation of any applicable law or regulation.
• Upload content that is unlawful, infringing, deceptive, harassing, hateful, or sexually explicit.
• Upload photographs of other identifiable people without their consent.
• Impersonate another person or misrepresent your affiliation with any person or entity.
• Interfere with, disrupt, or place an unreasonable load on the Services or the infrastructure that supports them.
• Probe, scan, or test the vulnerability of the Services, or breach or circumvent any security, authentication, or usage limits.
• Use the Services on behalf of a business, or resell, sublicense, or commercially exploit them, without our written permission.
• Use the Services in any way that violates the Apple Media Services Terms and Conditions or the App Store Usage Rules.

We may investigate suspected violations and may suspend or terminate access where we reasonably believe these Terms have been breached.

10. Intellectual property

The Services — including the Ratiō name and logo, the app software, its interface, design, text, graphics, and the nutrition analysis models and databases behind it — are owned by Ratiō or its licensors and are protected by copyright, trademark, and other laws. Apart from the limited license in Section 4, no rights are granted to you, whether by implication, estoppel, or otherwise.

Third-party names and trademarks. Any third-party product names, trademarks, or app names referenced on our website or in the Services — including in feature comparisons — are the property of their respective owners and are used solely for identification and comparative reference. Their use does not imply any affiliation with, sponsorship by, or endorsement from those owners.

If you believe content available through the Services infringes your copyright or other intellectual property rights, contact us at info@ratiohealthapp.com with a description of the work, the location of the material, and your contact information, and we will respond promptly.

11. Third-party services

Ratiō relies on third-party services to operate, including the Apple App Store, Sign in with Apple, Apple HealthKit, cloud hosting providers, and AI processing providers. The categories of providers we use and the data involved are listed in our Privacy Policy.

You agree to comply with any applicable third-party terms of agreement when using the Services. Your use of Apple features and services is governed by Apple's own terms and privacy policy. We do not control third-party services and are not responsible for their content, availability, policies, or practices. Any links to third-party websites are provided for convenience and are not an endorsement.

12. Termination & account deletion

Ending things on your side

You may stop using the Services at any time. In compliance with App Store Review Guideline 5.1.1(v), you can permanently delete your account and associated data directly in the app: open Ratiō and go to Profile → Settings → Account → Delete Account. Full details, including what happens to your data afterward, are in Account & Data Deletion.

Ending things on our side

We may suspend or terminate your access to the Services, with notice where reasonably practicable, if you materially breach these Terms, if your use creates legal or security risk for us or other users, or if we discontinue the Services. Where we discontinue the Services entirely, we will give reasonable advance notice and, where a paid subscription is affected, a pro-rated refund of any prepaid unused period through Apple where required by law.

Effect of termination

On termination, your license under Section 4 ends immediately and you must stop using the app. Sections that by their nature should survive — including 8, 10, and 14 through 19 — survive termination.

13. Apple-specific terms

The following additional terms apply to the version of Ratiō you obtain from the Apple App Store, and are required by Apple. Where they conflict with anything else in these Terms, these terms control for that version of the app.

1. Acknowledgement. These Terms are concluded between you and Ratiō only, and not with Apple Inc. ("Apple"). Ratiō, not Apple, is solely responsible for the Ratiō app and its content.
2. Scope of license. The license granted to you for the Ratiō app is a non-transferable license to use the app on any Apple-branded product that you own or control, and only as permitted by the Usage Rules set out in the Apple Media Services Terms and Conditions, except that the app may be accessed and used by other accounts associated with you via Family Sharing or volume purchasing where Apple makes those features available.
3. Maintenance and support. Ratiō is solely responsible for providing any maintenance and support services for the app, as specified in these Terms or as required by applicable law. You acknowledge that Apple has no obligation whatsoever to furnish any maintenance and support services with respect to the app.
4. Warranty. Ratiō is solely responsible for any product warranties, whether express or implied by law, to the extent they are not effectively disclaimed. In the event of any failure of the app to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price (if any) for the app to you. To the maximum extent permitted by applicable law, Apple will have no other warranty obligation whatsoever with respect to the app, and any other claims, losses, liabilities, damages, costs, or expenses attributable to any failure to conform to any warranty will be Ratiō's sole responsibility.
5. Product claims. Ratiō, not Apple, is responsible for addressing any claims by you or any third party relating to the app or your possession and use of it, including: (a) product liability claims; (b) any claim that the app fails to conform to any applicable legal or regulatory requirement; and (c) claims arising under consumer protection, privacy, or similar legislation, including in connection with the app's use of the HealthKit framework. These Terms do not limit Ratiō's liability beyond what is permitted by applicable law.
6. Intellectual property rights. In the event of any third-party claim that the app or your possession and use of it infringes that third party's intellectual property rights, Ratiō, not Apple, will be solely responsible for the investigation, defense, settlement, and discharge of any such claim.
7. Legal compliance. You represent and warrant that you are not located in a country that is subject to a U.S. Government embargo or that has been designated by the U.S. Government as a "terrorist supporting" country, and that you are not listed on any U.S. Government list of prohibited or restricted parties.
8. Developer name and address. Questions, complaints, or claims with respect to the app should be directed to Ratiō at info@ratiohealthapp.com, or via our Support page at ratiohealthapp.com/support.html.
9. Third-party terms of agreement. You must comply with applicable third-party terms of agreement when using the app.
10. Third-party beneficiary. Apple and Apple's subsidiaries are third-party beneficiaries of these Terms, and upon your acceptance of these Terms, Apple will have the right (and will be deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary.

14. Disclaimers

To the maximum extent permitted by applicable law, the Services are provided "as is" and "as available," without warranties of any kind, whether express, implied, or statutory. We specifically disclaim all implied warranties of merchantability, fitness for a particular purpose, title, non-infringement, and any warranties arising out of course of dealing or usage of trade.

Without limiting the above, we do not warrant that: the Services will be uninterrupted, timely, secure, or error-free; that any nutrition estimate, calorie target, or macro target will be accurate or complete; that defects will be corrected; or that the Services will meet your requirements or produce any particular health, fitness, or weight outcome.

Some jurisdictions do not allow the exclusion of certain warranties, so some of these exclusions may not apply to you. In that case, any statutory warranty is limited to the minimum period and extent permitted by law.

15. Limitation of liability

To the maximum extent permitted by applicable law, Ratiō and its officers, directors, employees, contractors, and agents will not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, revenue, data, goodwill, or other intangible losses, arising out of or relating to your use of or inability to use the Services — including any decision you make in reliance on a nutrition estimate or calorie or macro target — whether based in contract, tort, negligence, strict liability, or any other legal theory, and whether or not we have been advised of the possibility of such damages.

To the maximum extent permitted by applicable law, our total aggregate liability for all claims relating to the Services will not exceed the greater of (a) the total amount you paid us for the Services in the twelve months before the event giving rise to the claim, or (b) fifty U.S. dollars ($50).

Nothing in these Terms excludes or limits any liability that cannot be excluded or limited under applicable law, including liability for fraud, gross negligence, or willful misconduct, or for death or personal injury caused by negligence. Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages, so the above may not apply to you in full.

16. Indemnification

To the extent permitted by applicable law, you agree to indemnify, defend, and hold harmless Ratiō and its officers, directors, employees, contractors, and agents from and against any claims, liabilities, damages, losses, and expenses — including reasonable legal fees — arising out of or connected with: your use or misuse of the Services; your User Content; your violation of these Terms; or your violation of any law or the rights of a third party. We reserve the right to assume the exclusive defense and control of any matter subject to indemnification by you, in which case you agree to cooperate with us.

17. Dispute resolution & governing law

Let's talk first

If you have a problem, please contact us at info@ratiohealthapp.com before filing a claim. Most issues can be resolved quickly and informally. You agree to attempt good-faith resolution with us for at least 30 days before commencing formal proceedings.

Governing law

These Terms and any dispute arising out of them or the Services are governed by the laws of the State of California, United States, without regard to its conflict-of-law rules. If you are a consumer residing outside the United States — including in the EU, EEA, or UK — this choice of law does not deprive you of the protection of any mandatory consumer-protection provisions of the law of your country of residence, and you may be entitled to bring proceedings in your local courts.

Venue

Subject to the paragraph above, you and Ratiō agree that any dispute will be brought exclusively in the state or federal courts located in California, and you and Ratiō each consent to the personal jurisdiction of those courts. Either party may bring an individual claim in small claims court if it qualifies.

Individual claims

To the fullest extent permitted by applicable law, claims will be brought in an individual capacity and not as a plaintiff or class member in any purported class or representative proceeding. This does not limit any right you have under applicable law that cannot be waived.

Time limit

To the extent permitted by applicable law, any claim arising out of or relating to the Services must be filed within one year after it arises, or it is permanently barred.

18. Changes to these terms

We may update these Terms from time to time — for example, to reflect new features, new subscription options, or changes in the law. If we make material changes, we will notify you through the app or by email before they take effect. The "Last updated" date at the top of this page reflects the most recent revision.

Your continued use of the Services after changes take effect means you accept the revised Terms. If you do not agree to them, stop using the Services and, if you wish, delete your account as described in Section 12.

19. General

• Entire agreement. These Terms, together with our Privacy Policy and any additional terms presented in the app for a specific feature, form the entire agreement between you and Ratiō regarding the Services.
• Severability. If any provision is held unenforceable, that provision will be limited or removed to the minimum extent necessary, and the remaining provisions stay in full force.
• No waiver. Our failure to enforce any provision is not a waiver of our right to enforce it later.
• Assignment. You may not assign or transfer these Terms or your account without our written consent. We may assign these Terms in connection with a merger, acquisition, reorganization, or sale of assets.
• No agency. These Terms do not create any partnership, joint venture, employment, or agency relationship between you and Ratiō.
• Force majeure. Neither party is liable for a failure to perform caused by circumstances beyond its reasonable control.
• Notices. We may provide notices to you in the app or by email to the address on your account. You may send notices to us at info@ratiohealthapp.com.
• Export controls. You agree to comply with all applicable export and re-export control laws in your use of the Services.
• Language and headings. These Terms were drafted in English; in the event of a conflict with a translation, the English version controls except where local law requires otherwise. Headings are for convenience only.

20. Contact us

Questions, complaints, or claims regarding these Terms or the Ratiō app should be directed to:

Ratiō
Email: info@ratiohealthapp.com
Web: ratiohealthapp.com

For general help — account questions, waitlist status, or bug reports — visit our Support page. To understand how we handle your data, read our Privacy Policy.