Terms of Use

Last Updated: June 1, 2026

By using Zonas, you agree to these Terms of Use.

What Zonas Is

Zonas is a heart rate zone training app. It connects to Bluetooth heart rate monitors and Apple Watch, shows your current zone in real time, and saves workouts to Apple Health.

Zonas is built as a local-first app. Your data is stored on your device and in Apple Health, not on my servers.

Subscriptions and Payments

Zonas requires a paid subscription. Pricing varies by App Store region and is shown before purchase in Apple’s purchase sheet.

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current billing period. Apple manages billing, renewals, cancellation, and refunds through your App Store account.

You can manage or cancel a subscription in:

• Settings -> [Your Name] -> Subscriptions -> Zonas

If you have already purchased a subscription, you can also use the Restore Purchases option in the app.

Your Data

You own the workout and heart rate data created through Zonas.

I do not have access to that data, cannot review it, and cannot recover it for you.

If you uninstall the app, its local preferences are deleted. Workout data saved to Apple Health remains there until you remove it yourself.

If you choose to export or share your data, you are responsible for what you do with that exported copy.

Health and Device Features

Zonas connects to external Bluetooth heart rate monitors and may use Apple Health and Apple Watch features if you enable them and grant permission.

Heart rate data from these sources is processed on your device to calculate your training zone. Related data may be read from or written to Apple Health based on the permissions you grant. These features are optional and controlled by you.

Health Disclaimer

Zonas is a training tool, not medical advice, personal training advice, or a substitute for professional care.

Heart rate zones are estimates based on general formulas or your custom settings. They are not clinical measurements. Do not rely on Zonas for medical decisions.

You are responsible for your training decisions and for using the app in a safe and sensible way. If you have a heart condition or any health concerns, consult a doctor before using heart rate-based training.

Acceptable Use

You agree to use Zonas only for lawful, personal use.

You may not:

• reverse engineer the app
• copy or resell the app
• use the app in a way that violates applicable law

Disclaimer and Limitation of Liability

Zonas is provided on an “as is” basis, without warranties of any kind to the extent permitted by law.

To the maximum extent permitted by law, I am not liable for:

• loss of data
• injuries, health issues, or training outcomes
• inaccurate heart rate readings or zone calculations
• indirect, incidental, or consequential damages

If the law allows a limitation of liability, the maximum liability related to Zonas will not exceed the amount you paid for the app or subscription in the 12 months before the claim.

Changes to These Terms

I may update these Terms of Use from time to time. If I do, I will update the date at the top of this page. Continued use of Zonas after an update means you accept the revised terms.

Governing Law

These terms are governed by the laws of the Netherlands, and disputes will be handled by the courts of the Netherlands, unless applicable law requires otherwise.

Contact

If you have questions about these Terms of Use, contact:

Email: [email protected]

Effective Date: June 1, 2026

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Zonas is made by an independent, solo developer.