Terms of Service
Last updated: March 25, 2026
1. Introduction and Parties
1.1 About These Terms
These Terms of Service ("Terms") govern your access to and use of the Method Strength application ("Application" or "Service"), accessible at app.methodstrength.app. By creating an account or otherwise using the Service, you agree to be bound by these Terms. If you do not agree to these Terms, you may not use the Service.
1.2 The Provider
The Application is operated by:
Stolzenburg Ventures UG (haftungsbeschränkt) c/o IP-Management #7306 Ludwig-Erhard-Straße 18 20459 Hamburg, Germany
Email: contact@methodstrength.app Commercial Register: HRB 39224, District Court of Duisburg ("Provider," "we," "us," or "our")
1.3 The Service
Method Strength is a Progressive Web App (PWA) that provides AI-powered personalised strength training plans. It is designed primarily for adults aged 40 and above. The Application is accessed via a web browser and may be installed on your device. It is not a native application distributed through an app store.
1.4 Eligibility
You must be at least 18 years of age to create an account and use the Service. By creating an account, you represent and warrant that you are at least 18 years old and have the legal capacity to enter into these Terms.
2. Description of the Service
2.1 Service Tiers
The Service is offered in the following tiers:
Free Tier
- One AI-generated personalised training plan upon registration
- Workout logging with RPE (Rate of Perceived Exertion) input
- Access to the exercise library (110+ exercises with safety ratings)
- Previous session data display
- Offline functionality (workout logging without internet connection)
- Progress tracking
Pro Tier (Monthly or Annual subscription)
Everything in the Free Tier, plus:
- AI-powered post-workout feedback with micro-adjustments
- Weekly AI reviews (pattern recognition, volume adjustments)
- Monthly AI reviews (long-term progression, structural plan changes)
- Generation of new training plans
- PR history and progression trends
- Intelligent deload detection
- Limitation management with automatic exercise substitution
- Access to all future Pro features during the subscription period
Lifetime Tier
All Pro Tier features, for an unlimited duration (see Section 4.5).
2.2 Feature Changes
The specific features available within each tier may change as we develop and improve the Application. We do not guarantee any specific feature set beyond the core features described above. We will provide reasonable notice of any material changes that reduce the functionality of a paid tier (see Section 10).
2.3 Licence
Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable licence to access and use the Application for your personal, non-commercial purposes during the term of your agreement with us.
3. Account Registration
3.1 Account Creation
To use the Service, you must create an account by providing a valid email address and password, or by signing in via a supported third-party provider (Google, Apple, or Facebook). You agree to provide accurate, current, and complete information during registration and to keep your account information up to date.
3.2 Account Security
You are responsible for maintaining the confidentiality of your login credentials and for all activities that occur under your account. You agree to notify us immediately at contact@methodstrength.app if you become aware of any unauthorised use of your account.
3.3 One Account Per Person
Each individual may only create one account. Sharing your account credentials with third parties is prohibited.
4. Pricing, Payment, and Billing
4.1 Free Tier
The Free Tier is available at no charge. We reserve the right to adjust the feature set of the Free Tier over time, provided that the core features (workout logging, exercise library, offline functionality) remain available.
4.2 Paid Tiers
The following prices apply at the time of purchase (all prices inclusive of applicable taxes):
- Pro Monthly: €9.00 per month
- Pro Annual: €79.00 per year (equivalent to approximately €6.58 per month)
- Lifetime: One-time payment. The price depends on the pricing tier in effect at the time of purchase: €149.00 for the first 100 purchasers (Early Bird), thereafter €199.00.
Prices are displayed in Euros (€). Applicable taxes (including VAT, GST, or sales tax as applicable in your jurisdiction) are calculated and collected automatically via Stripe Tax.
4.3 Payment Processing
All payments are processed by Stripe, Inc. (or Stripe Payments Europe, Ltd. for European customers). Your payment information is handled entirely by Stripe's hosted checkout page. We do not receive, store, or process your credit card or bank account details. By purchasing a paid tier, you agree to Stripe's terms of service.
4.4 Billing Cycle
Subscriptions (Pro Monthly, Pro Annual) are billed in advance at the beginning of each billing period. Your subscription will automatically renew at the end of each billing period unless you cancel before the renewal date (see Section 5).
4.5 Lifetime Tier
The Lifetime Tier is a one-time purchase that grants you unlimited access to all Pro features for as long as the Service is in operation. The Lifetime Tier includes access to all future feature additions. In the event of permanent discontinuation of the Service, the provisions set out in Section 9.3 apply.
4.6 Late Payment
If a recurring payment fails, we may suspend your access to Pro features until the outstanding payment is resolved. We will notify you of any payment failure via email and provide a reasonable opportunity to update your payment method before downgrading your account to the Free Tier.
4.7 Managing Your Subscription
You can view and manage your payment details, invoices, and billing history through the Stripe Customer Portal, accessible via the application settings.
5. Term and Cancellation
5.1 Pro Monthly
The Pro Monthly subscription renews automatically each month. You may cancel at any time. Upon cancellation, you will retain access to Pro features until the end of your current billing period.
5.2 Pro Annual
The Pro Annual subscription has an initial term of one year and renews automatically. You may cancel at any time. Upon cancellation, you will retain access to Pro features until the end of your current annual billing period.
5.3 Lifetime Tier
The Lifetime Tier does not require cancellation. Your access to Pro features continues for as long as the Service is in operation (see Section 9.3).
5.4 Free Tier
The agreement for the Free Tier is entered into for an indefinite period. Either party may terminate it at any time without giving reasons. You may delete your account at any time via the application settings.
5.5 Cancellation Methods
You may cancel your subscription through:
- The Stripe Customer Portal (accessible via the application settings), or
- By email to contact@methodstrength.app
5.6 Termination by Us
We may terminate or suspend your account immediately, without prior notice, if you materially breach these Terms (see Section 7). In the event of termination for cause where you have a paid subscription, we will refund any prepaid fees on a pro rata basis for the remaining unused portion of the billing period.
5.7 Effect of Termination
Upon expiry or termination of a paid subscription, your account is downgraded to the Free Tier. Your existing training data, workout logs, and most recently active training plan are retained and remain accessible under the Free Tier.
6. Right of Withdrawal (EU/UK Consumers)
6.1 Statutory Right
If you are a consumer in the European Economic Area (EEA) or the United Kingdom (UK), you have a statutory right of withdrawal. The details of this right, including the withdrawal period and the model withdrawal form, are set out in our separate Right of Withdrawal / Widerrufsbelehrung document, which is made available to you before entering into the contract and is accessible at all times within the Application.
6.2 Digital Services Exception
For digital services where performance begins before the expiry of the withdrawal period, the right of withdrawal may expire early if you:
- expressly consent to the commencement of performance before the expiry of the withdrawal period, and
- acknowledge that you will lose your right of withdrawal upon full performance of the contract.
These confirmations are obtained during the checkout process.
6.3 Users Outside the EU/UK
If you are located outside the EU and UK, you may not have a statutory right of withdrawal. However, we offer a voluntary 14-day satisfaction guarantee: if you are not satisfied with the Service within 14 days of your first paid subscription, you may request a full refund by contacting us at contact@methodstrength.app, provided you have not made extensive use of the paid features during this period.
7. Acceptable Use
7.1 Your Responsibilities
You agree to:
(a) keep your login credentials confidential and protect them from unauthorised access; (b) use the Service only for lawful purposes; (c) not submit content that is unlawful, offensive, discriminatory, or otherwise objectionable (including in note fields, feedback inputs, and tags); (d) not circumvent, disable, or otherwise interfere with any security or access control features of the Service (including subscription tier enforcement and usage limits); (e) not access the Service through automated means (bots, scrapers, automated API calls) unless expressly authorised by us; (f) not reverse-engineer, decompile, disassemble, or otherwise attempt to derive the source code of the Application.
7.2 Consequences of Violation
If you breach these Terms, we may temporarily or permanently suspend your access to the Service. In the case of a material breach, we may terminate your account immediately in accordance with Section 5.6.
8. AI-Generated Content — Disclaimer
8.1 Nature of AI Content
The Application uses artificial intelligence (specifically, the Claude Sonnet language model by Anthropic, PBC) to generate personalised training plans and recommendations.
8.2 Not Medical Advice
AI-generated training plans and recommendations do not constitute medical, physiotherapeutic, or any other form of health advice. They are not a substitute for individual consultation with qualified professionals (doctors, physiotherapists, certified personal trainers).
8.3 Limitations of AI
Despite careful development and extensive quality assurance measures, we cannot guarantee that AI-generated recommendations are correct, complete, or suitable for your individual health condition in every case. In particular, the AI system may:
(a) suggest exercises that are not appropriate for your individual health status; (b) recommend training parameters (weights, repetitions, volume) that exceed your individual capacity; (c) fail to fully account for certain health conditions despite correct user input.
8.4 Your Responsibility
You are solely responsible for assessing whether the suggested exercises and training parameters are appropriate for your individual health condition. If you have any health conditions, pre-existing injuries, or experience discomfort during training, you should consult a doctor before continuing.
8.5 Health & Fitness Disclaimer
Further details regarding health and safety are set out in our separate Health & Fitness Disclaimer document, which you must acknowledge and accept during onboarding.
9. Availability and Discontinuation
9.1 Service Availability
We aim to provide uninterrupted access to the Service. However, we do not guarantee any specific level of availability (including any uptime percentage). Temporary interruptions may occur due to:
(a) scheduled maintenance (we will endeavour to provide advance notice); (b) disruptions at third-party providers (hosting, database, payment processor, AI API); (c) force majeure events (natural disasters, government orders, cyberattacks); (d) technical issues that could not reasonably be foreseen or prevented.
9.2 Offline Functionality
The offline functionality of the Application (workout logging via IndexedDB) is available regardless of server availability, provided the Application has been properly installed on your device.
9.3 Discontinuation of Service
We reserve the right to permanently discontinue the Service with at least three (3) months' prior notice. In such an event:
(a) users with an active paid subscription will receive a pro rata refund for the remaining prepaid period; (b) Lifetime users will receive a reasonable refund, the amount of which will be determined based on the duration of use and the purchase price paid; (c) all users will be given the opportunity to export their stored data (training plans, workout logs, profile data) in a machine-readable format.
10. Changes to the Service and Updates
10.1 Service Development
We may modify the Application in the course of ongoing development, including by:
(a) adding new features; (b) improving existing features; (c) updating AI models and training algorithms; (d) modifying the user interface.
10.2 Updates
We will provide updates necessary to maintain the Service in conformity with the contract during the subscription period. This includes security updates, functional updates, and compatibility updates when the operating environment (browser, operating system) changes. Updates are delivered automatically via the PWA's service worker. Manual action on your part is generally not required.
10.3 Material Changes
If a change materially reduces the functionality of a paid tier, we will notify you in advance. You may terminate your subscription free of charge within 30 days of receiving such notice. For EU/UK consumers, additional statutory rights under applicable consumer protection legislation may apply.
11. Changes to These Terms
11.1 Amendments
We may amend these Terms from time to time. We will provide you with at least 30 days' written notice (via email or in-app notification) before any amendments take effect. Your continued use of the Service after the effective date of the amended Terms constitutes your acceptance of the changes.
11.2 Right to Terminate
If you do not agree to the amended Terms, you may terminate your subscription before the effective date of the changes. If you have a paid subscription, you will receive a pro rata refund for the unused portion of your billing period.
12. Limitation of Liability
12.1 Exclusions We Do Not Make
Nothing in these Terms excludes or limits our liability for:
(a) death or personal injury caused by our negligence; (b) fraud or fraudulent misrepresentation; (c) any liability that cannot be excluded or limited under applicable law (including, for UK consumers, under the Consumer Rights Act 2015; and for Australian consumers, under the Australian Consumer Law).
12.2 Limitation
Subject to Section 12.1, and to the maximum extent permitted by applicable law:
(a) our total aggregate liability to you for all claims arising out of or relating to these Terms or the Service shall not exceed the greater of (i) the total amounts paid by you to us in the twelve (12) months preceding the event giving rise to the claim, or (ii) €100; (b) we shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of profits, data, use, or goodwill, regardless of the theory of liability; (c) we shall not be liable for any damages arising from your reliance on AI-generated training recommendations, provided that we have exercised reasonable care in the design and implementation of safety measures (including exercise safety ratings, limitation management, and rule-based safety filters) as described in Section 8.
12.3 Australian Consumer Law
If you are a consumer under the Australian Consumer Law (Schedule 2 of the Competition and Consumer Act 2010 (Cth)), our goods and services come with guarantees that cannot be excluded under the Australian Consumer Law. Nothing in these Terms purports to modify or exclude the conditions, warranties, and undertakings implied by the Australian Consumer Law. Our liability for a failure to comply with a consumer guarantee is limited, to the extent permitted by law, to the re-supply of the service or payment of the cost of having the service re-supplied.
12.4 New Zealand Consumer Law
If you are a consumer under the Consumer Guarantees Act 1993 (NZ), nothing in these Terms is intended to limit your rights under that Act.
13. Indemnification
To the maximum extent permitted by applicable law, you agree to indemnify, defend, and hold harmless the Provider, its officers, directors, and employees from and against any claims, damages, losses, and expenses (including reasonable legal fees) arising out of or relating to:
(a) your breach of these Terms; (b) your misuse of the Service; (c) your violation of any applicable law or regulation; (d) any content you submit through the Service (including notes, tags, and feedback).
This indemnification obligation does not apply to the extent that the claim arises from our negligence or wilful misconduct, or to the extent that it is unenforceable under applicable consumer protection law.
14. Privacy
The processing of your personal data is governed by our Privacy Policy, which is available at all times within the Application under "Privacy." The Privacy Policy is not part of these Terms but provides comprehensive information about the nature, scope, and purpose of data processing as well as your rights as a data subject.
15. Intellectual Property
15.1 Ownership
All rights in and to the Application, including the software, design, text, graphics, exercise descriptions, and other content, belong to us or our respective licensors.
15.2 User Content
AI-generated training plans and recommendations created for you may be saved and printed by you for personal use. Commercial exploitation, reproduction, or distribution to third parties without our express consent is prohibited.
15.3 Exercise Library
The exercise library, scientific descriptions, and safety ratings are protected by copyright. Any reproduction or use outside the Application requires our prior written consent.
16. Dispute Resolution
16.1 Governing Law
These Terms are governed by the laws of the Federal Republic of Germany, excluding the United Nations Convention on Contracts for the International Sale of Goods (CISG). Mandatory consumer protection provisions of the country in which you are habitually resident shall not be affected.
16.2 Jurisdiction
If you are a merchant (Kaufmann), a legal entity under public law, or a special public-law fund, the exclusive place of jurisdiction for all disputes is Hamburg, Germany.
16.3 Consumer Dispute Resolution
We are neither obligated nor willing to participate in dispute resolution proceedings before a consumer arbitration board (Verbraucherschlichtungsstelle).
16.4 UK and Australian Consumers
Nothing in this section restricts your right to bring proceedings in your local courts if you are entitled to do so under mandatory consumer protection legislation in your jurisdiction.
17. General Provisions
17.1 Entire Agreement
These Terms, together with our Privacy Policy, the Right of Withdrawal (for EU/UK consumers), and the Health & Fitness Disclaimer, constitute the entire agreement between you and us regarding the use of the Service. They supersede all prior or contemporaneous communications and proposals, whether oral or written.
17.2 Severability
If any provision of these Terms is found to be invalid, illegal, or unenforceable, the remaining provisions shall continue in full force and effect.
17.3 No Waiver
Our failure to enforce any right or provision of these Terms shall not constitute a waiver of such right or provision.
17.4 Assignment
You may not assign or transfer your rights or obligations under these Terms without our prior written consent. We may assign our rights and obligations under these Terms without restriction.
17.5 Language
These Terms are available in English. A German-language version of the terms governing the Service (Allgemeine Geschäftsbedingungen) is also available. In the event of any conflict or inconsistency between the English and German versions, the German version shall prevail.
17.6 Contact
For any questions regarding these Terms, please contact us at: contact@methodstrength.app
17.7 Current Version
These Terms are available in their current version within the Application under "Terms of Service."