Legal

Terms of Service

Last updated: October 8, 2026

1. Agreement to these Terms

These Terms of Service ("Terms") govern your access to and use of Metal Strength — the website at metalstrength.fit, the Android and iOS apps, the workout builder, the training-program library, workout tracking, the exercise library, the calculators, account features, and related pages and services (together, the "Service"). By accessing or using the Service, you agree to these Terms. If you do not agree, do not use the Service.

2. Operator and scope

The Service is operated by an independent developer based in France ("Metal Strength", "we", "us", or "our"). These Terms apply to the website, the mobile apps, and account features. They do not replace any mandatory terms that may apply through an app store, device platform, authentication provider, payment provider, advertising provider, or other third-party service.

Website host: Cloudflare, Inc., 101 Townsend Street, San Francisco, CA 94107, United States (cloudflare.com). Account data and files are stored by Supabase (supabase.com) — see the Privacy Policy.

3. What the Service does

Metal Strength is a training app. Depending on the part you use, and whether you are signed in, it lets you:

The exercise library, the calculators and the whole program list can be browsed without an account. Saved workouts, saved sessions, history, charts, progress photos and profile defaults require sign-in.

A large part of the Service is free. We also offer an optional paid tier, Metal Strength Premium, sold as an auto-renewing subscription — see section 4. We do not sell physical goods.

Training content (programs, set and rep schemes, exercise instructions and demonstration clips) is general reference material produced from established training principles. It is not a personalised coaching plan and is not supervised by a coach — see section 7.

4. Premium subscriptions

Metal Strength Premium is an optional paid subscription that unlocks additional features — for example the full training-program library, unlimited saved plans and bookmarks, your complete workout history rather than the most recent period, unlimited progress photos, the long-period statistics views, cloud-synced plan drafts, and removal of advertising on the website (the apps show none). It is offered as an auto-renewing monthly or annual plan. The price, billing period, and any promotional discount are shown before you confirm the purchase, together with the fact that the plan renews automatically until you cancel.

We keep improving Premium, and we may adjust its features for good reasons (for example security, a legal requirement, or a change at a provider we depend on). A change never costs you anything extra. If a change would reduce what you are paying for by more than a minor amount, we will tell you in advance by email or in the app, and you may then end your subscription free of charge within 30 days of the change and receive a refund of the unused part of the period you paid for.

Recording your training is free and is not rationed. A free account can run and save as many workouts as it likes, with no daily limit. What a free account gets is a shorter window on its own history: every chart, rank and record in the app is drawn from the most recent period of training (currently 90 days). Older records are retained, never deleted, they reappear if you subscribe, and a data export always contains everything we hold on you whichever plan you are on.

• Billing. On the website, payments are processed by PayPal under PayPal's own terms. In the mobile apps, subscriptions are sold through the platform store — Google Play on Android and the Apple App Store on iOS — and billed by that store to the payment method on your store account. In every case we never receive your full card or bank details. Your subscription renews automatically at the end of each billing period until you cancel.
• Confirmation. After you subscribe on the website we email you a confirmation you can keep: the plan, the price and how often it is charged, the fact that it renews automatically until you cancel, how to cancel, and your right of withdrawal. Store purchases are confirmed by Google or Apple.
• Cancelling. You can cancel online at any time, in the same place and as easily as you subscribed — you never have to call, write, or speak to anyone. A subscription bought on the website is cancelled in Settings → Membership → Cancel subscription (two taps) or from your PayPal account. A subscription bought in the app is cancelled where the store manages it — Google Play subscriptions in the Play Store, App Store subscriptions in your Apple ID settings; Settings → Membership links straight there. There is no cancellation fee: billing stops, and Premium stays active until the end of the period you already paid for.
• Renewal reminders. On an annual plan we email you between 31 and 40 days before each renewal, with the renewal date, the price and how to stop it. On a monthly plan we email you a reminder of your subscription every six months. During a free trial we email you 1 to 3 days before the first payment. These emails are part of the contract, not marketing, and are sent whatever your email preferences.
• Free trial (website). A Premium subscription bought on the website may start with a 14-day free trial, offered once per account. Before you subscribe you are told the price that applies after the trial and the date the first payment is taken, and you tick a box confirming you understand that the trial becomes a paid subscription on that date unless you cancel before. Cancel at any time during the trial (Settings → Membership, or your PayPal account) and you pay nothing; Premium then stays active until the trial ends. If you do not cancel, the subscription continues at the price shown, renewing each month or year until you cancel. The trial runs during your 14-day withdrawal period, so the change to a paid subscription is not a new contract and does not open a new withdrawal period. Purchases in the apps follow the store's own offer, if any.
• 14-day right of withdrawal. You may withdraw from a Premium subscription within 14 days of the day you subscribed, without giving any reason. Consumers in the EU, EEA and UK have this right by law; we give it to every customer, wherever they live. To withdraw, use the “Withdraw from contract here” button in Settings → Membership (on the website and in the apps), which is shown for the whole 14 days. It tells you, before you confirm, exactly what you will get back; after you press “Confirm withdrawal” your subscription ends, Premium stops, the refund is sent straight away, and we email you an acknowledgement with the date and time we received your withdrawal. You may also withdraw by any other clear statement — an email to [email protected] from your account address, or the model form below.
  How much is refunded. On the website, before you pay, you are asked to tick a box requesting that Premium starts immediately, during the withdrawal period. If you made that request, we refund the price you paid minus a proportionate amount for the days of Premium already supplied (counted in whole days, rounded in your favour). If you did not — including every purchase made through Google Play or the App Store, whose checkout asks no such question — nothing is deducted and the full price is refunded. If you withdraw during a free trial, nothing has been charged and nothing ever will be.
  Where the refund goes. Website purchases are refunded to your PayPal account and Google Play purchases through Google Play, at once and in any case within 14 days of your withdrawal. App Store purchases can only be refunded by Apple: we record and acknowledge your withdrawal, and you request the refund from Apple at reportaproblem.apple.com.
  Beyond this right, payments already made are non-refundable except where the law provides otherwise.
• Price changes. We may change subscription prices. A change never affects a period you have already paid for: we email you 30 days before the new price first applies (and never fewer than 7 days before), with the new price, the date it applies and how to cancel, so you can cancel first if you disagree. Store subscriptions also follow Google's and Apple's own price-change rules, which may ask you to accept the new price before it is charged.
• One entitlement, every platform. Premium is tied to your Metal Strength account, so an active subscription unlocks the same features on the website and in the apps. Cancelling with one biller does not cancel a separate subscription bought through another.

Model withdrawal form

(Complete and return this form only if you wish to withdraw from the contract.)
To: Metal Strength, [email protected]
I hereby give notice that I withdraw from my contract for the supply of the following service: Metal Strength Premium (monthly / annual)
Subscribed on: ________ · Account email: ________
Name: ________ · Date: ________

5. Eligibility

Metal Strength is for adults: you must be at least 18 years old to create an account or submit personal data through the Service. Sign-up asks for your age and does not accept an age under 18, and you confirm that you are 18 or older when you create your account. The Service stores body and training data and offers training and fat-loss programs that are designed for adults, which is why it is not open to minors.

If we learn that an account belongs to someone under 18, we will close it and delete its data. If you believe a minor has created an account, please tell us at [email protected].

By using the Service, you confirm that the information you provide is accurate and that you are legally able to accept these Terms.

6. Your account

Creating an account is optional. When you create one, you must accept these Terms and our Privacy Policy. You can sign up with an email address and password or with a supported sign-in provider (Google on the website and in the apps; Sign in with Apple in the iOS app). You are responsible for maintaining the confidentiality of your login credentials and for activity under your account. Notify us promptly at [email protected] if you believe your account has been accessed without permission.

You may stop using your account at any time. You can delete individual saved workouts, sessions, lifts and photos in your dashboard. To delete the whole account, open Dashboard → Settings → Delete account or follow these instructions.

7. Fitness and training disclaimer

The Service is an informational fitness tool only. It does not provide medical advice, diagnosis, treatment, injury-prevention advice, or personalised coaching. Training programs, suggested exercises, set and rep targets, rest times, estimated calorie burn, strength tiers, percentiles, estimated one-rep max values, bodyweight ratios, and other outputs are general estimates based on formulas, templates and reference data. They may be incomplete, inaccurate, out of date, or unsuitable for your circumstances. You choose what to train and how hard; the Service does not supervise you.

Resistance training can involve serious risk, especially maximal or near-maximal lifting. Always train within your abilities, use proper technique and equipment, and seek advice from a qualified physician, healthcare provider, or coach before beginning or changing a training program. Stop training and seek help if you experience pain, dizziness, or unusual symptoms. Our Disclaimer forms part of these Terms.

8. Your content and saved data

Workouts and plans you build, saved sessions, lift entries, body and profile data, progress photos, messages, and other information you choose to submit remain yours. By submitting or saving content, you give us the limited permission needed to host, store, process, transmit, and display that content back to you, operate the Service, protect the Service, and respond to your requests. We do not use your training data or your photos to advertise, and we do not publish them.

You must not submit content that is unlawful, abusive, misleading, infringing, or that you do not have the right to provide. We do not sell your personal data. How we handle personal data is explained in the Privacy Policy.

Sharing your training with friends

Friends is optional and starts switched off; nothing about your training reaches another person unless you turn sharing on yourself, and you can turn it off, or remove a friend, at any time. What a friend can and cannot see — and in particular that the days you train, the loads you lift, your body measurements and your progress photos are never included — is set out in the Privacy Policy.

Please share carefully: while we control what the Service shows a friend, we cannot control what a person does with something they have already been shown. Choose who you connect with accordingly, and treat what a friend shares with you as private to them.

If you import data from another fitness app, you confirm the file is your own export and that you have the right to upload it. Imported entries become saved sessions on your account and are yours to edit or delete like any other; we do not verify their accuracy.

9. Photos and video uploads

Some features let you upload images or video:

• Progress photos are stored privately and are visible only to you. They are never public, never shared with other users, and never used for anything other than showing you your own history.
• Record submissions. If you submit a lift for the community record board, you upload a video of the lift and a photo or video of the weight, plus the details of the attempt. You confirm that you appear in — or hold the rights to — what you upload, and you give us permission to review it, and to publish the record details (such as the lift, the load and the name you provide) if it is accepted. We may decline or remove any submission, for any reason, including if it looks unsafe, edited, or misattributed.

Do not upload anything containing another person who has not agreed to it, anything unlawful, or anything you do not have the right to upload.

10. Acceptable use

You agree not to:

• use the Service for any unlawful, harmful, fraudulent, or abusive purpose;
• attempt to access another user's account, saved data, photos, or any non-public system;
• probe, scan, attack, overload, scrape, or disrupt the Service or its infrastructure;
• circumvent authentication, entitlement checks, rate limits, bot protection, consent tools, or security controls, or access paid features without an active subscription;
• bulk-copy the exercise library, the training programs, or other reference content, by hand or by automated means;
• submit malware, spam, false contact details, or automated form submissions;
• use Friends to harass anyone, to send unwanted requests at scale, or to guess, harvest, or publish other people's friend codes;
• choose a display name that impersonates another person, or that is offensive or misleading to the friends who see it;
• republish, sell, or otherwise pass on training information a friend shared with you, or keep using it after they have removed you or switched sharing off;
• upload an import file containing data that is not yours to import;
• interfere with advertisements or generate invalid ad impressions, clicks, or traffic;
• copy, resell, sublicense, or commercially exploit the Service without written permission;
• use the Service in a way that violates another person's rights or applicable law.

11. Intellectual property

The Service, including its name, branding, interface, design, text, software, training programs, exercise descriptions, illustrations, demonstration media, calculations, and compiled reference materials, is owned by us or our licensors and is protected by intellectual-property and other laws. These Terms do not grant you ownership of the Service, our branding, or our content.

You may use the Service for personal, non-commercial training purposes. You may not redistribute our programs or exercise content as your own, remove notices, reverse engineer the Service except where law permits it, or use our name, logo, or branding in a way that suggests endorsement without permission.

The exercise illustrations, animations and demonstration clips are licensed to us by a third-party provider for display inside the Service only. You may view them while using the Service, but you may not download, extract, copy, redistribute or reuse them anywhere else.

12. Third-party services, links, and advertising

The Service relies on third-party providers for hosting, security, authentication, database and file storage, email delivery, sign-in, payments, subscription management, and advertising. These include Supabase, Cloudflare, Resend, Google, Apple, PayPal and RevenueCat. Third-party services are governed by their own terms and privacy policies.

The website may display advertisements and links to third-party websites. We are not responsible for third-party content, products, services, security, or privacy practices. Advertising is provided through Google AdSense; see our Privacy Policy and Cookie Policy for information about advertising cookies and your choices. The mobile apps show no advertising, to free and Premium accounts alike. A Premium subscription removes advertising from the website.

Developer API. Premium members may create personal access tokens to read their own data through our API. The API is provided for your personal use, as described at metalstrength.fit/developers, which includes its rate limits and usage rules. You are responsible for keeping your tokens secret and for anything done with a token you created. We may revoke tokens that are shared, abused or used to exceed the limits, and we may change the API with notice on that page.

13. Mobile applications

The Metal Strength apps for Android and iOS provide the same account and the same features as the website, and these Terms cover your use of them. App-store providers (Google Play, Apple App Store) apply their own terms, privacy notices, billing and refund rules, and technical requirements. To the extent there is a conflict between these Terms and mandatory app-store terms for the app, the mandatory app-store terms apply for that app-store relationship.

The apps ask for device permissions only where a feature needs them — for example camera or photo access when you add a progress photo or scan a friend's QR code. You can decline, and the rest of the app keeps working.

14. Availability and changes to the Service

We provide the Service on an "as available" basis. We may update, improve, suspend, restrict, or discontinue any part of the Service at any time, including individual features, programs, or free allowances. We may also impose reasonable limits to protect security, prevent abuse, or comply with law. We do not guarantee that the Service will always be available, secure, uninterrupted, or error-free. This does not affect your rights over the paid part of the Service, set out in sections 4 and 15.

15. Disclaimer of warranties

To the fullest extent permitted by applicable law, the Service is provided "as is" and "as available" without warranties of any kind, whether express, implied, or statutory, including warranties of accuracy, reliability, fitness for a particular purpose, merchantability, non-infringement, availability, or that results will meet your expectations.

Nothing in these Terms limits any warranty, guarantee, or right that cannot lawfully be excluded under applicable consumer law. In particular, if you are a consumer in the EU you have the legal guarantee of conformity for digital content and services (in France, articles L224-25-12 and following of the Code de la consommation): if the Service does not conform, you are entitled to have it brought into conformity and, failing that, to a price reduction or to end the contract.

16. Limitation of liability

To the fullest extent permitted by applicable law, we will not be liable for indirect or unforeseeable losses, for losses that were not caused by a breach of these Terms or a fault on our part, or for loss of profits, goodwill, or business opportunity. You decide what, how and how hard you train (see section 7); we are not responsible for an injury that results from those choices rather than from a fault of ours.

Nothing in these Terms excludes or limits liability that cannot legally be excluded or limited, including liability for death or personal injury caused by our fault or negligence, for intentional misconduct, fraud, or gross negligence, or your mandatory French and EU consumer-protection rights, including the legal guarantee of conformity for digital content and services.

17. Consumer rights

If you use the Service as a consumer, you may have mandatory rights under the laws of your country of residence. These Terms are not intended to reduce those rights. In particular, mandatory rules about digital services, unfair contract terms, data protection, and consumer remedies remain unaffected where they apply.

18. Suspension and termination

You may stop using the Service at any time. We may suspend or terminate your access, remove content, or restrict features if we reasonably believe that you breached these Terms, created risk for the Service or other users, violated law, or used the Service abusively.

Sections that by their nature should continue after termination, including intellectual property, disclaimers, limitations of liability, governing law, and dispute provisions, will continue to apply.

19. Changes to these Terms

We may update these Terms from time to time and will update the "Last updated" date when we do. When a change is material, we will tell you at least 30 days before it takes effect, by email or in the app — unless a shorter delay is required by law or to protect security. If you do not agree, you can delete your account at any time, and cancel a paid subscription before the change applies; section 4 explains your rights when a change affects Premium. If you keep using the Service after the change takes effect, the updated Terms apply to you.

20. Governing law and disputes

These Terms are governed by the laws of France, without regard to conflict-of-law rules. If you are a consumer, this choice does not deprive you of the protection of the mandatory rules of the country where you live, and, where the law allows it, you may bring a claim before the courts of that country. Disputes will be submitted to the competent courts, subject to any mandatory consumer jurisdiction rules that apply.

Complaints

If something goes wrong, write to [email protected] with your account email and what happened. We acknowledge every complaint within 5 working days and give you a full answer within 30 days. If you live in the EU, Iceland, Liechtenstein or Norway and we are unable to settle a cross-border complaint, the European Consumer Centre in your country can help you free of charge (ECC-Net). Purchases made through Google Play or the App Store can also be raised with the store.

Language of these Terms

These Terms are available in English and in French. If you live in France, or in Quebec, the French version is the one that applies to you; everyone else may rely on either, and if they differ, the version more favourable to you applies.

21. Contact

Questions about these Terms? Email [email protected].

Point of contact and reporting illegal content

Under the EU Digital Services Act, [email protected] is our single point of contact for users and for authorities; you can write to us in English or French. To report content on the Service that you believe is illegal — for example a friend's display name, or a submitted record — email us with where it appears, why you believe it is illegal, and your name and email (unless you are reporting child sexual abuse material). We review every report, act on it without undue delay, and tell you what we decided. If we remove content or restrict an account, we tell the person concerned why, and they can contest the decision by replying to that message.

Copyright complaints

We respect intellectual property and respond to notices of alleged copyright infringement under the US Digital Millennium Copyright Act (DMCA) and the EU Digital Services Act. Our designated agent for copyright notices is Metal Strength, at [email protected] (subject: "Copyright notice"). A notice should include: your physical or electronic signature; the work you say is infringed; the material you say infringes it and where it appears on the Service; your contact details; a statement that you believe in good faith the use is not authorised by the owner, its agent or the law; and a statement, under penalty of perjury, that the notice is accurate and that you are the owner or authorised to act for the owner. If we remove material, we tell the person who posted it, who may send a counter-notice with the same details plus consent to the jurisdiction of the competent court; we then restore the material within 10 to 14 business days unless the complainant tells us they have started legal proceedings. We close the accounts of repeat infringers.