Flex — Terms of Service

Last updated: 2026-06-10 Effective date: 2026-06-10

These Terms of Service ("Terms") govern your use of the Flex training app and website (the "Service"). By creating an account or using the Service, you agree to these Terms. If you do not agree, do not use the Service.

The Service is provided by Robert Perry, operating as Flex ("Flex", "we", "us", "our"). A dedicated legal entity is being incorporated; this document will be updated to name it upon registration. Our registered address is available on request via privacy@runwithflex.com.

1. Eligibility

You must be at least 13 years old (US) or 16 years old (UK / EEA) to use the Service. If you are under 18, you confirm that a parent or guardian has reviewed and agrees to these Terms on your behalf.

You may not use the Service if you are prohibited from doing so by any applicable law, or if you have been previously suspended or removed from the Service by us.

2. Your account

You must provide accurate, current information when you create an account.
You are responsible for all activity under your account.
You must keep your password confidential.
One account per person.
You may not transfer your account to anyone else.
If you suspect unauthorized access, contact support@runwithflex.com immediately.

3. The Service

Flex provides AI-powered, constraint-aware running training plans, adaptive plan revisions based on your data, optional integrations with wearable devices and Strava, and optional push notifications.

The Service is not medical advice. See the separate Health & Safety guidance, which is part of these Terms by reference. You are asked to acknowledge it the first time you use your training dashboard; that acknowledgment is binding.

We do not guarantee that following a Flex plan will achieve any particular result. Training outcomes depend on many factors outside our control (genetics, recovery, weather, illness, life events, your effort).

4. Free beta

The Service is currently provided free of charge while in beta. There are no subscription fees, in-app purchases, or paid tiers today.

If we launch paid subscriptions in the future, we will update these Terms with at least 30 days' notice by email and in-app before any charge applies. Any future purchases would be governed by the payment terms of the relevant platform (Apple App Store, Google Play, or Stripe) in addition to these Terms. You will never be charged without explicitly opting in to a paid plan.

5. Acceptable use

You agree NOT to:

Share your account or login with anyone else.
Scrape, mirror, or republish the Service or its content.
Use the Service for any unlawful purpose.
Reverse-engineer, decompile, or attempt to extract source code (except as permitted by mandatory local law).
Use bots, scripts, or automated means to access the Service except via published APIs.
Submit knowingly false health information that could mislead our plan generator into prescribing unsafe training.
Resell, sublicense, or commercially exploit the Service or any output from it.
Interfere with security, reliability, or other users' enjoyment of the Service.
Use the Service if you have been told by a doctor that running or vigorous exercise is unsafe for you (see the Health & Safety guidance).

Violation may result in immediate suspension or termination of your account.

6. Your content; your data

You own the content you submit (your goals, your workouts, your logs). You grant us a worldwide, non-exclusive, royalty-free license to use that content only to operate the Service for you (generate plans, adapt them, fetch forecasts, sync to your wearable, etc.) and to derive aggregated, de-identified statistics for improving the Service.

You can request an export of your data at any time: email privacy@runwithflex.com and we will provide a machine-readable JSON export within 30 days.

You can delete your account and data via Settings → Delete account. Full deletion takes effect within 30 days. See the Privacy Policy for retention details.

7. Our content; our intellectual property

The Service, including the underlying algorithms (constraint-aware feasibility, adaptive engine, VDOT calculations, periodization logic), the brand name "Flex", the orange "F" mark, the visual design, and all original training-plan content generated for you, are owned by us or our licensors and are protected by copyright, trademark, and trade-secret law.

We grant you a personal, non-transferable, non-exclusive license to use the Service for your own training. You may print or save your own plan for personal reference. You may not redistribute it.

8. Third-party integrations

If you connect a wearable, Strava, or your calendar, you authorize us to exchange data with that third party on your behalf. The third party's own terms and privacy policy apply to your relationship with them. We are not responsible for the accuracy, availability, or behavior of third-party services.

9. Disclaimers

The Service is provided "as is" and "as available." We do not warrant that:

The Service will be uninterrupted, timely, secure, or error-free.
Defects will be corrected.
The Service or the servers that make it available are free of viruses or other harmful components.
The training plans will achieve any specific fitness, weight-loss, or race-time outcome.

The Service is not a medical device, not a substitute for professional medical advice, diagnosis, or treatment, and not intended to diagnose, treat, cure, or prevent any disease or condition.

To the maximum extent permitted by applicable law, we disclaim all warranties, express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, non-infringement, and any warranties arising from course of dealing or usage of trade.

10. Limitation of liability

To the maximum extent permitted by applicable law:

We are not liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, including loss of profits, loss of data, loss of fitness gains, loss of race results, loss of goodwill, or personal injury arising from training following a Flex plan.
Our total cumulative liability to you for any claim arising out of or related to the Service is limited to the amount you paid us in subscription fees during the 12 months immediately preceding the event giving rise to the claim, or £100 / $100 if you have paid us nothing.

UK / EEA consumers: nothing in these Terms limits or excludes our liability for (a) death or personal injury caused by our negligence, (b) fraud or fraudulent misrepresentation, (c) any liability that cannot be limited or excluded under UK / EU consumer protection law (including the UK Consumer Rights Act 2015).

US consumers: some jurisdictions do not allow limitation of incidental or consequential damages, so the above limit may not apply to you in full.

11. Indemnification

You agree to indemnify and hold us harmless from any claim or demand made by any third party arising out of:

Your breach of these Terms.
Your violation of any law or third-party right.
Your misuse of the Service.

This does not apply to UK / EEA consumers where prohibited by law.

12. Termination

We may suspend or terminate your account at any time for material breach of these Terms, with notice where reasonable (immediate suspension is allowed for serious risks, abuse, or fraud). You may terminate at any time by deleting your account in Settings.

The Service is free during beta, so no refunds apply on termination. If paid subscriptions launch in the future, refund treatment will be set out in the updated Terms (see Section 4).

13. Governing law and jurisdiction

These Terms are governed by the laws of England and Wales, except where consumer-protection law in your country of residence grants you stronger protections (in which case those local protections apply).

Disputes are subject to the exclusive jurisdiction of the courts of England and Wales, except:

UK consumers may bring proceedings in the courts of their place of residence.
EU consumers may bring proceedings in the courts of their member state of residence.
US consumers may bring proceedings in the courts of their state of residence and may rely on state consumer-protection statutes.

Online dispute resolution (EU / UK): if you are an EU / UK consumer, you can use the EU's Online Dispute Resolution platform (or the UK equivalent) to resolve disputes.

14. Changes to these Terms

We may update these Terms. Material changes will be announced at least 30 days before they take effect, via email and in-app. By continuing to use the Service after the effective date, you accept the updated Terms. If you do not accept, your remedy is to stop using the Service and delete your account before the new Terms apply.

15. Miscellaneous

Severability: if any provision is found unenforceable, the rest remains in effect.
No waiver: our failure to enforce any provision is not a waiver of our right to enforce it later.
No assignment: you may not assign these Terms; we may assign them to a successor entity (e.g. in an acquisition, or to the dedicated legal entity once incorporated) with notice to you.
Entire agreement: these Terms, together with the Privacy Policy and the Health & Safety guidance, are the entire agreement between you and us regarding the Service.
Apple-specific: for the iOS app, you acknowledge that Apple has no obligation to provide support or maintenance for the app and is not a party to these Terms. Apple is a third-party beneficiary entitled to enforce these Terms against you.

16. Contact

General support and billing questions: support@runwithflex.com
Legal and privacy: privacy@runwithflex.com

Document version: v1.1