Terms of Use

1. Provider

Flexen UG (haftungsbeschränkt)
Paul-Heidelbach-Straße 14
34134 Kassel, Germany
Registered with the Commercial Register of Amtsgericht Kassel under HRB 20498
Email: info@flexen.co

2. Scope and Subject Matter

This website serves general information about Flexen UG and its products only. No contracts are concluded through this website, no goods or services are sold and no user accounts are created.

These legal notices apply to use of the website. Contracts for the Flexen app are governed by the app Terms of Use in Part B.

3. Content and Copyright

All content on this website (texts, images, logos, trademarks, design, source code) is protected by copyright. Any use beyond private, non-commercial use requires the prior written consent of Flexen UG.

“Flexen” and “Project Pluto” are product names of Flexen UG. Other trademarks mentioned on the website are the property of their respective owners.

4. Accuracy of Content

We make reasonable efforts to keep the content of this website accurate and up to date. However, we make no warranty as to the accuracy, completeness or timeliness of content. In particular, statements about features, availability and status of the Flexen and Project Pluto apps are non-binding and may change at any time.

We do not warrant continuous, uninterrupted availability of the website. Maintenance work and technical issues may cause temporary limitations.

5. External Links

This website contains links to external third-party websites whose content we cannot influence. The respective provider or operator is solely responsible for the content of linked pages.

6. Limitation of Liability

We are liable without limitation for damages arising from injury to life, body or health and for damages caused intentionally or by gross negligence. Otherwise, our liability is limited to foreseeable damages typical for the contract. Further liability is excluded to the extent permitted by law.

7. Data Protection

Information on the processing of personal data can be found in our Privacy Policy.

8. Changes

We reserve the right to update these website Terms of Use at any time. The current version is always available on this page. Changes to the app Terms of Use are governed by Part B § 10.

9. Final Provisions

These Terms are governed by the laws of the Federal Republic of Germany, excluding the UN Convention on Contracts for the International Sale of Goods. If the user is a consumer, mandatory consumer protection provisions of the state in which the user has their habitual residence remain unaffected.

Should individual provisions of these Terms be or become invalid, the validity of the remaining provisions shall remain unaffected.

§ 1 Scope and Contracting Party

These Terms of Use (Part B) govern the use of the mobile app Flexen for iOS and Android, including all features and content offered within the app. In case of conflict between Part A and Part B, Part B prevails for the use of the app.

Your contracting party is
Flexen UG (haftungsbeschränkt)
Paul-Heidelbach-Straße 14
34134 Kassel, Germany
Commercial Register: HRB 20498, Amtsgericht Kassel
Represented by the managing directors Marcel Schneider, Leon Schmelzle
Email: info@flexen.co

Deviating or supplementary terms of the user do not apply, even if we do not expressly object to them.

§ 2 Description of Services

Flexen is an app for nutrition, fitness and habit tracking. Its features include in particular:

• Nutrition tracking: meal logs, analysis of food photos, barcode scanning, recipes and fridge inventory
• Fitness: AI-generated training plans and exercises, weight history, step and water tracking
• Habits and mind: journal, mood tracking, sleep logging
• Medication reminders with intake schedule
• The AI coach Julio for questions about nutrition, training and habits
• An optional friends feature for sharing activity data

The specific scope of features may change as the app evolves (see § 7).

§ 3 Account and Registration

Use of the app requires a user account. You can register with an email address and password, via Google Sign-In or with a phone number.

You agree to provide truthful and up-to-date information during registration and in your profile. Use of the app requires a minimum age of 16 years.

Keep your login credentials confidential and do not share them with third parties. You are responsible for all activity through your account to the extent attributable to you. Notify us immediately at info@flexen.co if you suspect unauthorized use of your account. The account is not transferable.

§ 4 Subscriptions and Payments

Certain features of the app are only available with a paid subscription or one-time purchase. Currently offered:

• Monthly subscription (base price USD 4.99 per month)
• Yearly subscription (base price USD 47.99 per year) with a 7-day free trial
• Lifetime access (base price USD 159.99, one-time payment)

The price displayed to you in the Apple App Store or on Google Play in your local currency before purchase is decisive.

Purchase, payment processing, renewal, refunds and cancellation are handled exclusively through the Apple App Store or Google Play; their terms apply in addition. We do not receive any payment data, only your subscription status. Subscriptions renew automatically for the respective term unless cancelled at least 24 hours before the end of the current period via your store account settings. A free trial that is not cancelled converts automatically into the paid subscription.

Right of withdrawal for digital content: Consumers generally have a statutory right of withdrawal. For contracts on the supply of digital content, the right of withdrawal expires if you expressly consent to performance beginning before the end of the withdrawal period and confirm your knowledge that you thereby lose your right of withdrawal (Sec. 356(5) German Civil Code, BGB). Withdrawal and refund requests are processed through the procedures provided by Apple or Google. Your statutory consumer rights remain unaffected.

We will announce price changes with reasonable advance notice (e.g. in the app or by email). They take effect no earlier than the next subscription period. If you do not agree to a price change, you can cancel the subscription before it takes effect.

§ 5 AI Features

Parts of the app are based on artificial intelligence, in particular the AI coach Julio, the analysis of food photos, the generation of training plans and the transcription of voice notes.

AI-generated results can be incorrect, incomplete or inaccurate. Nutritional and calorie information — especially from photo analysis — are estimates, not exact measurements.

You use AI features at your own responsibility. Review AI output critically before basing decisions on it — especially in case of allergies, intolerances or medication use. AI responses do not constitute medical advice (see § 2).

§ 6 User Content

You retain all rights to content you create or upload in the app (e.g. food photos, journal entries, meal logs, recipes). You grant us a simple, non-exclusive license, limited to the term of the contract, to store, technically reproduce and process this content to the extent necessary to provide the app's features (including AI-based analysis of your requests and photos).

You agree not to post unlawful content and not to infringe third-party rights (in particular copyright and personality rights). In case of violations, we may remove or block the affected content.

§ 7 Availability and Further Development

We strive for high availability of the app. There is no entitlement to constant, uninterrupted availability (100% uptime). Maintenance work, updates, disruptions at third-party providers or force majeure may cause temporary limitations.

We continuously develop the app and may change, extend or discontinue features to a reasonable extent. Your statutory rights under contracts for digital products (Secs. 327 et seq. German Civil Code, BGB) remain unaffected.

§ 8 Liability

We are liable without limitation for intent and gross negligence, for damages arising from injury to life, body or health, under the German Product Liability Act and within the scope of any guarantee we have given.

In cases of simple negligence, we are liable only for the breach of a material contractual obligation (cardinal obligation), i.e. an obligation whose fulfilment makes the proper performance of the contract possible in the first place and on whose observance you may regularly rely. In such cases, liability is limited to the foreseeable damage typical for the contract.

Any further liability is excluded.

§ 9 Termination and Account Deletion

You can stop using the app at any time and delete your account directly in the app: Settings → Account → “Delete account”. Deletion is started immediately in the app. Your data is deleted or anonymised in our active systems unless statutory retention obligations require longer storage; backups are overwritten within 30 days at the latest. Details can be found on the Delete Account page. Alternatively, you can request deletion by email to info@flexen.co.

Important: Deleting your account does not cancel an active subscription. Cancel your subscription separately in the settings of your Apple or Google Play account.

We may terminate the user relationship for good cause, in particular in case of serious or repeated violations of these terms. Statutory termination rights remain unaffected.

§ 10 Changes to these Terms

We may amend these Terms of Use with effect for the future where there is a valid reason to do so (e.g. changes in legislation or case law, new or changed features) and the amendment is reasonable for you. We will not change material contractual obligations to your disadvantage without your consent.

We will announce changes with reasonable advance notice in the app or by email. If you do not agree to a change, you can end the user relationship at any time in accordance with § 9.

§ 11 Final Provisions

These Terms are governed by the laws of the Federal Republic of Germany, excluding the UN Convention on Contracts for the International Sale of Goods. If you are a consumer, mandatory consumer protection provisions of the state in which you have your habitual residence remain unaffected.

We are neither willing nor obliged to participate in dispute resolution proceedings before a consumer arbitration board (Sec. 36 German Consumer Dispute Resolution Act, VSBG).

Should individual provisions of these Terms be or become invalid, the validity of the remaining provisions shall remain unaffected.

Last updated: June 12, 2026