These Terms of Use (the "Terms") are a contract between you and Mats Claes, trading as Weight Loss Made Practical, Kerkenbos, 2812 Muizen, Belgium ("we", "us"). They govern your use of the ButtMaxx mobile application, the website buttmaxx.app and the related services (together, the "Service"). Our Privacy Policy at buttmaxx.app/privacy explains how we handle your personal data and forms part of these Terms.

By installing, opening or using ButtMaxx you agree to these Terms. If you do not agree, do not use the Service. Where you download the app through an app store, that store's own terms also apply to the download and to any purchase you make through the store.

You must be at least 18 years old to use the Service. The onboarding asks your age and stops if you are under 18. The body scan asks you to photograph yourself in underwear or tight shorts, which is why the app is for adults only. By using the Service you confirm that you are 18 or older and able to enter into a binding contract.

ButtMaxx is a glute-training app for women. It offers:

We may add, change or remove features at any time. Some features require a subscription or a one-time purchase (section 10).

When you first open the app we create an anonymous account automatically. You can later link it to Apple, Google or an email address so you can recover your data on another device. You are responsible for keeping your device and linked sign-in secure and for everything that happens under your account.

You can delete your account at any time in the app under Settings → Delete Account. Deletion permanently removes your profile, plans, workouts, meals, measurements, scan photos and scores, and cannot be undone. Deleting the app alone does not delete your account, and deleting your account does not cancel a store subscription (section 10).

We grant you a personal, limited, non-exclusive, non-transferable and revocable licence to install and use the app on devices you own or control, for your own non-commercial fitness purposes and in accordance with these Terms and the applicable store rules. You may not copy, modify, distribute, sell, rent, reverse engineer or attempt to extract the source code of the app, or use it to build a competing product, except where mandatory law allows this.

You agree not to:

You keep all rights to the photos, voice recordings, messages and other content you submit ("Your Content"). So that the Service can work, you grant us a limited, non-exclusive, royalty-free licence to store, copy, transmit and process Your Content, including sending it to the third-party AI provider that produces scan scores, meal estimates, transcriptions and coach replies. This licence exists only to provide the Service to you and ends when you delete the content or your account. We do not use Your Content for advertising, show your photos to other users, or use them to train AI models.

Scanning a friend. If you use a guest scan ("Scan a friend"), you confirm that the person is an adult and has agreed to be photographed and to have the photo analysed. Guest photos are analysed and then deleted immediately; no result is stored. You are responsible for any photo of another person that you submit.

Not medical advice. ButtMaxx provides general fitness and nutrition information. Nothing in the Service is medical, dietary, physiotherapy or psychological advice, diagnosis or treatment, and it does not replace a physician, registered dietitian or certified trainer. Talk to a doctor before starting a training or nutrition programme, especially if you are pregnant or postpartum, have or have had an eating disorder, an injury, a heart condition or any other medical condition, or take medication.

Exercise at your own risk. Exercise carries an inherent risk of injury. You are responsible for your own safety: warm up, use equipment correctly, train within your ability, and stop immediately if you feel pain, dizziness, chest discomfort or shortness of breath. Seek medical help if symptoms persist.

Nutrition estimates. Calorie and macronutrient targets are estimates based on the information you give us. Food recognition from photos or voice, barcode data and food-database results are approximations and may be wrong. Always check product labels, and do not follow a target that feels unsafe for you.

Body scan scores. Scan scores are a consistent visual assessment produced by an AI model so you can compare your own photos over time. They are not a measurement of body composition, body fat, muscle mass, health, fitness or attractiveness and have no medical meaning. Lighting, pose, clothing and camera angle affect them.

No guaranteed results. Results vary from person to person and depend on many factors outside the app. We do not promise any physical outcome.

Scan scores, meal estimates, transcriptions and coach replies are generated by automated systems, currently Google's Gemini models. AI output can be inaccurate, incomplete or unsuitable for your situation, and no human reviews it before you see it. Use your own judgement, verify anything important, and do not rely on it for medical decisions. Do not enter sensitive information such as medical records, financial details or other people's personal data into the coach chat. You are responsible for how you use AI output.

Subscriptions. Premium access is sold as an auto-renewing subscription (weekly, monthly or yearly, as offered in the app). The price and renewal period are shown before you buy, and the app store takes payment through your store account. Subscriptions renew automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel in your app store account's subscription settings; deleting the app or your ButtMaxx account does not cancel a subscription. If we raise the price, the store will notify you and, where required, ask for your consent before it applies.

Trials and introductory offers. If we offer a free trial or introductory price and you do not cancel before it ends, your subscription converts to the regular price shown at purchase. Offers may be limited to one per person.

Guest scan packs. Guest scans are sold as one-time packs of a fixed number of scans. Credits are added once the store confirms the purchase, do not renew, have no cash value and are lost if you delete your account.

Refunds. Purchases are processed by the app store you bought through, and refund requests must be made to the store under its policy; we cannot issue refunds ourselves except where the law requires it. If you are a consumer in the EU or UK, you agree that the digital content is delivered immediately on purchase and acknowledge that you lose your 14-day right of withdrawal once delivery starts, as confirmed in the store's purchase flow. Your statutory rights for defective digital content are not affected.

The app, the ButtMaxx name and logo, the training programmes, exercise videos and images, texts, design and software are owned by us or our licensors and are protected by copyright, trade mark and other laws. Except for the licence in section 5, nothing in these Terms gives you any rights to them. If you send us feedback or suggestions, we may use them without obligation to you.

The Service relies on third parties, including the app stores, Apple and Google (sign-in), Supabase (database, sign-in and storage), Google (Gemini AI), RevenueCat (purchases), Open Food Facts and USDA FoodData Central (food data). Their availability and accuracy are outside our control; public food data is provided as-is by its contributors.

You may stop using the Service and delete your account at any time. We may suspend or terminate your access if you breach these Terms, misuse the AI features or submit prohibited content, or if the law or a store requires it, and we may discontinue the Service with reasonable notice. Sections 7 to 9 and 11 to 16 survive termination.

The Service is provided "as is" and "as available". To the extent permitted by law we make no warranties, express or implied, about its accuracy, reliability, fitness for a particular purpose, uninterrupted availability or the results you will achieve. Where the law does not allow a warranty exclusion, it does not apply to you.

To the fullest extent permitted by law, we are not liable for indirect, incidental, special or consequential losses, loss of data, or for injury, illness or health effects arising from exercise or nutrition choices you make using the Service, from reliance on AI-generated content, estimates or scores, or from your failure to follow professional medical advice. Our total liability for all claims relating to the Service is limited to the amount you paid us in the twelve months before the claim.

Nothing in these Terms limits liability for death or personal injury caused by our negligence, for fraud or gross negligence, or any other liability that cannot be limited under the law that applies to you. If you are a consumer, you keep all mandatory protections of the law of your country of residence.

These Terms are governed by the laws of Belgium. If you are a consumer living in another EU country or the UK, you also keep the mandatory consumer-protection rules of that country and may bring claims in your local courts. The European Commission's online dispute resolution platform is at ec.europa.eu/consumers/odr; we are not obliged and do not undertake to take part in proceedings before a consumer arbitration body. Please contact us first so we can try to resolve the issue directly.

We may update these Terms when the Service or the law changes. We will post the new version at buttmaxx.app/terms with a new "Last updated" date and notify you in the app of material changes. Continuing to use the Service after a change takes effect means you accept it; if you do not, stop using the Service and delete your account.

If any part of these Terms is invalid, the rest remains in force. Not enforcing a provision is not a waiver. You may not transfer your rights under these Terms; we may transfer ours to a successor of the Service. These Terms and the Privacy Policy are the entire agreement between you and us about the Service. Apple and other app store operators are not parties to these Terms and owe you no support or maintenance for the app.