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Terms of Use

Last updated: 2026-08-21 · v1.0

Welcome to Karven. These Terms of Use ("Terms") govern access to and use of the Karven app and website (together, the "Service"), operated by Karven ("we", "us"). The complete identification of the party responsible for the Service is provided upon request at [email protected] and to the competent authorities when required by law. By creating an account, downloading the app, or using the Service, you agree to these Terms. If you do not agree, do not use the Service.

1. Eligibility

You must be at least 18 years old to create an account and use the Service.

2. Your account

  • You are responsible for the accuracy of the information you provide and for keeping your access credentials confidential.
  • You are responsible for all activity on your account.
  • Notify us immediately at [email protected] if you suspect unauthorized use of your account.
  • We may suspend or terminate accounts that violate these Terms, provide false information, or engage in abusive behavior.

3. What Karven does

Karven helps you plan and log workouts and track your diet, and offers an AI Coach that suggests workouts, adjusts your plan, and gives feedback based on the data you provide. Basic logging features are free. The AI Coach and other Pro features require an active subscription.

4. Health and physical activity notice

Karven is not a medical device and does not provide regulated nutrition, physical education, or medical guidance services. In Brazil, individualized diet prescription is an activity reserved for licensed nutritionists, and exercise program prescription is an activity reserved for licensed physical education professionals; Karven does not replace these professionals. Workout plans, calorie/macro targets, and AI Coach suggestions are generated automatically based on the information you provide and general fitness heuristics. They are an organization and suggestion tool, not individualized guidance from a doctor, registered dietitian, or certified personal trainer.

  • Consult a doctor before starting any exercise or diet program, especially if you have a pre-existing medical condition, an injury, or are pregnant.
  • Stop exercising immediately and seek medical attention if you feel pain, dizziness, or discomfort.
  • You use the Service, and act on any suggestion it makes, at your own risk. Karven is not liable for injuries, health complications, or damages arising from the use of workout or diet content.

5. AI-generated content

The AI Coach, automatic workout and diet generation, and meal photo/nutrition label analysis use third-party language models (see our Privacy Policy, §6). This content is generated automatically and may contain errors, inaccuracies, or inconsistencies, including calorie or macronutrient estimates from a photo that do not exactly match the actual meal. Review suggestions before following them. To preserve the quality and availability of the Service for all users, we may apply reasonable usage limits to AI features, which, when in place, are disclosed within the app itself.

6. Subscriptions and payments

Paid plans ("Pro") are billed and processed by our subscription infrastructure provider (RevenueCat) through the Apple App Store or Google Play, as applicable.

  • Billing: subscriptions renew automatically for the same period (monthly or annual), unless canceled before the renewal date. Price and renewal terms are shown before purchase.
  • Free trial: new subscribers receive 30 free days on their first subscription; at the end of that period, you will be charged automatically unless you cancel beforehand.
  • Cancellation: you can cancel at any time in your Apple ID or Google Play account settings. Cancellation stops future renewals.
  • Right of withdrawal: every Karven subscription is contracted remotely, directly through the app, never at a physical commercial establishment. For this reason, if you are a consumer in Brazil, you have the right to withdraw from the contract within 7 calendar days of subscribing, under Article 49 of the Brazilian Consumer Protection Code (CDC), with a full refund of amounts paid. This right is exercised directly with Apple or Google, who process the payment. Check their refund policies or contact [email protected] for guidance. Outside this period, canceling stops future renewals but does not refund the period already charged.
  • Refunds: refunds are processed by Apple or Google, according to their respective policies. Karven does not process payments or refunds directly.
  • Price changes: we may change subscription prices; changes apply to future billing cycles and, when required by law or the app store, we will notify you in advance.

7. Acceptable use

You agree not to:

  • Use the Service for unlawful purposes or in violation of these Terms;
  • Attempt to reverse engineer, decompile, or bypass security or subscription controls;
  • Submit unlawful content, content that violates third-party rights, or content that impersonates another person;
  • Interfere with the normal operation of the Service (for example, via scraping, overload, or exploitation of vulnerabilities);
  • Share your account with third parties to circumvent subscription limits.

8. Content and intellectual property

  • The app, website, brand, logo, and underlying software of Karven belong to us or our licensors and are protected by intellectual property law. These Terms do not grant you any rights to our trademarks or visual identity.
  • You retain ownership of the data you enter (for example, workout logs, meal photos, body measurements). You grant us a limited license to process that data solely to operate and improve the Service, as described in our Privacy Policy.
  • The exercise catalog, illustrations, and AI-generated suggestions are provided for your personal, non-commercial use within the app.
  • Some reference nutritional information shown in the app comes from the open Open Food Facts database, made available under the Open Database License (ODbL), and may contain inaccuracies typical of a collaborative database. Content submitted by other users (where applicable) may also contain inaccuracies and is not verified by us before display.

9. Offline use and data synchronization

The app is designed to work offline; data logged while you are offline is stored on your device and synced with our servers once you reconnect. You are responsible for keeping your device secure, since locally stored data is protected only by your device's own security.

10. Availability and changes to the Service

We may add, change, suspend, or discontinue features of the Service at any time. The Service may experience periods of unavailability for maintenance or for reasons beyond our control; we aim to minimize these impacts, but we do not guarantee uninterrupted availability.

11. Termination

You can stop using the Service and delete your account at any time within the app (Profile → My Account → Delete Account) or by contacting [email protected]. We may suspend or terminate your access if you violate these Terms, misuse the Service, or when required by law. After termination, your right to use the Service ends; data deletion follows what is described in our Privacy Policy.

12. Disclaimers and limitation of liability

The Service is provided "as is" and "as available," without warranties of any kind, express or implied. To the maximum extent permitted by applicable law, Karven and its team are not liable for indirect, incidental, or consequential damages arising from the use of the Service, including, but not limited to, health-related outcomes, data loss, or service interruptions. Nothing in these Terms limits liabilities that cannot be excluded under applicable law (including the Brazilian Consumer Protection Code).

13. General provisions

If any provision of these Terms is found invalid or unenforceable, the remaining provisions remain in full effect. You may not assign or transfer your rights under these Terms without our prior consent. Communications related to your account may be made to your registered email address or through in-app notifications.

14. Changes to these Terms

We may update these Terms periodically. Material changes will be communicated in the app or by email before taking effect. Continuing to use the Service after changes take effect constitutes acceptance of the updated Terms. The "last updated" date at the top of this page reflects the most recent revision.

15. Governing law and venue

These Terms are governed by the laws of Brazil. Any disputes will be submitted, at the consumer's discretion, to the court of the consumer's domicile, under Article 101, I of the Brazilian Consumer Protection Code.

16. Contact

Questions about these Terms? Contact us at [email protected].