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Terms of Use and Sale — Sthenia

Last updated: 20 June 2026

This is an English translation provided for convenience. In the event of any discrepancy, the French version prevails.

1. Purpose

These general terms (the "Terms") govern access to and use of the Sthenia mobile app (the "App") and the associated services. They also govern purchases made through the App.

The App is published by Jordan Buch, sole trader (entrepreneur individuel, "EI"), trading under the name JB Labs, whose details appear in the Legal Notice.

Using the App requires full and unconditional acceptance of these Terms. If you do not accept them, you must not use the App. These Terms are supplemented by the Privacy Policy.

2. Definitions

  • App: the Sthenia mobile app and its services.
  • Publisher: Jordan Buch (EI), trading under the name JB Labs.
  • User: any person who downloads, installs or uses the App.
  • Subscription: the paid plan (Premium) giving access to extended features.

3. Access to the App and account

The App is reserved for people aged 18 or over.

Using the features requires creating an account. You undertake to provide accurate information and to keep it up to date. You are responsible for keeping your credentials confidential and for any activity carried out from your account. Notify us without delay of any unauthorised use.

4. Description of the service

The App offers, among other things: tracking of diet and goals, generation of meal plans and recipes tailored to the User's sport, goal and budget, meal-image analysis, and nutritional-calculation features. Some features rely on artificial-intelligence models (see the Privacy Policy).

The Publisher may change, add or remove features at any time to improve the service.

The App is offered under a free plan and a paid plan (Premium), whose respective features and limits are described in the App. The free plan includes usage limits (for example a limited number of plan or recipe generations, and image analyses, over a given period). The Publisher may also apply technical usage limits to prevent abuse and ensure service quality. These limits may change; the applicable terms are those displayed in the App.

5. Health disclaimer — no medical advice

Please read this section carefully.

The App provides nutritional information and suggestions for purely indicative purposes. It does not provide medical advice and is in no case a substitute for a consultation with a healthcare professional, in particular a doctor or a dietitian.

Calculations of calorie and macronutrient needs are based on standard formulas and on the information you provide; they are estimates, not prescriptions. You must consult a healthcare professional before any significant change to your diet or physical activity, in particular if you have a medical condition, are pregnant, or have any other risk factor.

The content of the App may not be appropriate for people who have suffered or suffer from eating disorders. If this is your case, we recommend you not use the App without the advice of a healthcare professional.

The User expressly acknowledges using the App at their own risk and under their sole responsibility.

6. Subscription, price and renewal

Some features are accessible via a paid subscription, offered under plans and prices shown in the App at the time of purchase.

  • Subscriptions are taken out and billed via the App Store (Apple) or Google Play (Google), depending on your device. Payment, billing and subscription management are handled by these platforms.
  • Unless stated otherwise, subscriptions renew automatically: they renew for an identical period, at the prevailing price, unless cancelled before the end of the current period.
  • A free trial may be offered. Unless cancelled before it ends, the trial automatically converts into a paid subscription.
  • You can manage and cancel your subscription at any time from your App Store or Google Play account settings. Cancellation takes effect at the end of the current period already paid for.
  • Deleting your Sthenia account does not cancel your subscription. To stop billing, you must cancel the subscription directly with the App Store or Google Play.

7. Right of withdrawal

In accordance with the rules applicable to digital content and services, by requesting immediate access to the paid features, you acknowledge that performance of the service begins immediately and you agree to waive your right of withdrawal once the service is fully performed. The applicable refund conditions are otherwise those of the App Store or Google Play, through which the purchase is made.

8. Intellectual property

The App, its structure, content, texts, visuals, databases and recipes are protected by intellectual-property law and remain the property of the Publisher or its partners.

The Publisher grants you a personal, non-exclusive and non-transferable licence to use the App for your private use. Any unauthorised reproduction, extraction, distribution or exploitation is prohibited.

For iOS users, the licence to use the App is further subject to Apple's standard licence agreement (Licensed Application End User License Agreement), available at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

9. User obligations

You undertake to use the App lawfully and in accordance with these Terms. In particular, you must not attempt to circumvent security measures, disrupt the service, use the App in an abusive automated manner, or infringe the rights of the Publisher or third parties.

10. Liability and warranties

The Publisher provides the App with care but does not guarantee that the App will operate without interruption or error, or that it is compatible with any device or configuration. The App is provided "as is".

To the extent permitted by law, the Publisher cannot be held liable for indirect damages, or for the consequences of using the nutritional information provided for indicative purposes (see section 5).

Nothing in these Terms deprives the consumer of the mandatory legal warranties, in particular the legal warranty of conformity (Articles L. 217-3 et seq. of the French Consumer Code) and the warranty against hidden defects (Articles 1641 et seq. of the French Civil Code).

11. Personal data

The processing of your personal data is described in the Privacy Policy, which forms an integral part of these Terms.

12. Term and termination

These Terms apply for the entire duration of use of the App. You may stop using the App and delete your account at any time. The Publisher may suspend or terminate access in the event of a breach of these Terms.

13. Changes to the Terms

The Publisher may amend these Terms to reflect legal or service developments. The update date appears at the top of the document. By continuing to use the App after a change, you accept the amended Terms.

14. Governing law and dispute resolution

These Terms are governed by French law.

In the event of a dispute, you may use a consumer mediator free of charge before any legal action. In accordance with Article L. 612-1 of the French Consumer Code, after contacting us and failing a satisfactory response, you may refer the matter free of charge to consumer mediation with:

CM2C — 49 rue de Ponthieu, 75008 Paris, France Phone: +33 1 89 47 00 14 Website: https://www.cm2c.net/declarer-un-litige.php Email: [email protected]

You may also use the European online dispute resolution platform: https://ec.europa.eu/consumers/odr

Failing an amicable resolution, the French courts have jurisdiction, subject to the protective rules applicable to consumers.