Legal

Privacy Policy

Last updated: 17 June 2026

Your privacy is not a feature — it is the foundation Weyli is built on. This policy explains, in plain language, what we collect, why we collect it, and what we will never do with your data.

1. Our Privacy Commitment

Weyli operates on a simple principle: your health data belongs to you and stays on your device. We built Weyli so that the most sensitive information you share — your body, your habits, your progress — never touches our servers. Here is what that means in practice:

  • Your health data is processed entirely on your device and is never uploaded to our servers.
  • We do not sell, rent, or trade your personal data to anyone. Ever.
  • We do not use your health data for advertising, marketing, or data mining.
  • We do not allow third parties to use your data to train AI models.
  • We only request the permissions Weyli needs to function — nothing more.

2. Information We Collect

2.1 Information you provide directly

  • Account data: your name, email address, and authentication credentials when you create an account.
  • Profile data: details such as age, gender, height, weight, fitness goals, dietary preferences, and injury history that you share during onboarding or when updating your profile.
  • Coaching conversations: messages you exchange with your AI coach. These are stored so the coach can remember your context and provide personalised guidance.
  • Payment information: all billing is handled by the Apple App Store or Google Play Store. We never see or store your card details.

2.2 Health data (Apple HealthKit & Google Health Connect)

When you grant permission, Weyli reads and writes health data through Apple HealthKit on iOS or Google Health Connect on Android. Health Connect data is classified as personal and sensitive user data under Google's User data policy and is treated accordingly.

The categories of health data Weyli may access are:

  • Steps, active energy burned, distance, and workout sessions
  • Heart rate, resting heart rate, and heart rate variability
  • Sleep analysis and duration
  • Nutrition, water intake, and calorie data
  • Body weight, height, BMI, body fat percentage, and lean body mass

Weyli also writes data back to HealthKit or Health Connect — such as meals you log, workouts you record, and weight entries — so your health records stay in sync across all your apps.

This data never leaves your device. It is not uploaded to our servers, not sent to our AI providers, and not used for any purpose other than powering the coaching dashboards and insights you see in the app.

You can revoke Weyli's access to your health data at any time through Apple Health or Android Health Connect settings on your device.

2.3 Automatically collected data

To keep the app reliable and improve your experience, we collect a limited amount of technical data:

  • Device type, operating system version, and app version
  • Anonymous usage analytics (which screens are viewed, which features are used) via Firebase Analytics
  • Crash reports via Firebase Crashlytics to help us fix bugs
  • Push notification tokens, if you opt into AI nudge notifications
  • Approximate location, only if you enable location-based nudges

None of this data can be used to identify you personally, and it is never linked to your health data.

3. How We Use Your Information

We use the information we collect for a limited set of purposes, all directly related to making Weyli work for you:

  • Providing, personalising, and improving your AI coaching experience
  • Generating weekly training and nutrition plans tailored to your goals
  • Delivering AI nudge notifications you have opted into
  • Syncing your logged data and displaying progress dashboards
  • Processing in-app purchases through the app stores
  • Responding to your support enquiries
  • Meeting our legal obligations

We do not use your information for any purpose beyond these. We do not build advertising profiles, conduct behavioural analytics, or sell insights to third parties.

4. AI and Your Data

Weyli's AI coaching is powered by external language model providers. We have deliberately architected the system to protect your privacy:

  • Health data is never sent to AI providers. All health data processing happens on your device. The AI coach only receives the conversation context you choose to share.
  • Zero Data Retention (ZDR) providers only. We partner exclusively with AI providers that contractually commit to processing your inputs transiently — your conversations are used to generate a response and are then discarded. They are never stored or used for model training.
  • No advertising use. Your conversations with the AI coach are never used for advertising, profiling, or any purpose other than generating your coaching response.

5. Data Sharing

We share the minimum data necessary with the following categories of recipients, and only to the extent required for the Service to function:

  • AI model providers: conversation inputs for generating coaching responses (Zero Data Retention — see Section 4).
  • Firebase (Google): anonymous analytics, crash diagnostics, and push notification delivery.
  • Apple / Google: in-app purchase processing and subscription management.
  • Law enforcement: only when we are legally compelled to do so.

We do not share your data with advertisers, data brokers, social media platforms, or any other third party not listed above.

6. Data Retention

We keep your data for as long as you need it, and not a day longer:

  • Account and profile data: retained for as long as your account is active.
  • Coaching conversation memory: 30 days on the free plan; indefinitely on Premium. You can clear it at any time from within the app.

When you delete your account, all associated data is permanently removed from our systems (see Section 7).

7. Data Deletion

You are in control. Delete your account and all associated data at any time via Settings → Account → Delete Account in the app, or by emailing contact@weyli.com. Deletion is permanent and irreversible. Full details are in our Data Deletion Policy.

8. Your Rights

Depending on where you live, you may have the right to:

  • Access the personal data we hold about you
  • Correct any inaccurate data
  • Request deletion of your data (the "right to be forgotten")
  • Restrict or object to how we process your data
  • Receive your data in a portable format
  • Withdraw your consent at any time

To exercise any of these rights, email contact@weyli.com. We will respond within 30 days.

9. Health Disclaimer

Weyli is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. The health information, coaching insights, and fitness plans provided by Weyli are for general wellness and informational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment.

Always consult a qualified healthcare professional before making health-related decisions, starting a new exercise programme, or changing your diet. If you have a medical condition or any concerns about your health, speak to your doctor first.

Never disregard professional medical advice or delay seeking it because of something you have read or received through Weyli.

10. Children's Privacy

Weyli is not intended for children under 13. We do not knowingly collect personal data from anyone under 13. If you believe a child has provided us with personal data, please contact us immediately and we will delete it.

11. Security

We take the security of your data seriously. We use industry-standard measures including TLS encryption in transit, encrypted storage for sensitive data, and strict access controls. Because your health data never leaves your device, it is protected by your device's own security — the strongest layer of protection available.

No system is perfectly secure, but we are committed to keeping yours as safe as possible.

12. International Transfers

Weyli Ltd is registered in the United Kingdom. Where data processing requires it (such as AI coaching responses or analytics), your data may be processed by service providers in the United States or European Economic Area. We ensure appropriate safeguards are in place for all international transfers.

13. Changes to This Policy

We may update this policy from time to time. If we make material changes, we will notify you through the app or by email. Continued use of Weyli after a change constitutes acceptance of the updated policy.

14. Contact Us

Questions, requests, or concerns about your privacy?
Weyli Ltd
Email: contact@weyli.com