Terms of use

1. The app

Stress Meter reads heart rate variability, resting heart rate, sleep and active energy that Apple Watch saves to Apple Health, compares each with your own usual range from the last 28 days, offers context logging and guided breathing, and can take a one-minute heart rate variability reading from your fingertip with the iPhone camera. Its readings depend on when and how your Apple Watch measures, which the app does not control.

2. License and acceptable use

We grant you a personal, limited, non-exclusive, non-transferable, revocable license to use the app for lawful purposes on devices you own or control. You may not copy, redistribute, sell, lease, reverse engineer, bypass security or purchase controls, interfere with the service, or misuse the app except where applicable law expressly permits it.

3. Your content

You keep ownership of the notes you create in the app and are responsible for how you use them and for keeping any backups you need.

4. Advertising and purchases

The app is free and shows advertising. Two optional purchases remove ads, and nothing else, on devices signed in with the same Apple Account: Remove Ads, a one-time, non-consumable purchase, and Remove Ads Yearly, an auto-renewable subscription. Apple handles payment, restoration, and refund requests under its rules. The price shown by Apple before purchase controls.

Remove Ads Yearly renews automatically each year at the price shown by Apple unless you cancel it at least 24 hours before the end of the current period. If the purchase includes a free trial, payment is charged to your Apple Account when the trial ends, and any unused part of the trial ends when you buy. You can manage or cancel the subscription in your Apple Account settings (Settings > your name > Subscriptions); cancelling stops the next renewal, and ads return when the paid period ends.

5. Updates and availability

We may update, change, suspend, limit, or discontinue features to maintain security, compatibility, legal compliance, or product quality. We do not promise that the app will always be uninterrupted, error-free, or compatible with every device, accessory, service, or operating-system version.

6. Disclaimer

Stress Meter is a general wellness app, not a medical device. It does not diagnose, treat, cure or prevent any condition, and its strain estimate is not a measure of stress, mood or health. Readings are estimates derived from Apple Watch data or, for a camera reading, from your iPhone camera, and may be missing, delayed or inaccurate. Do not use the app for medical decisions; talk to a doctor about health concerns, and seek emergency care when needed.

To the maximum extent permitted by law, the app is provided “as is” and “as available.” We disclaim implied warranties, including merchantability, fitness for a particular purpose, accuracy, quiet enjoyment, and non-infringement. Mandatory consumer rights remain unaffected.

7. Limitation of liability

To the extent permitted by law, we are not liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost data, profits, opportunities, or business interruption arising from use of or inability to use the app. Nothing in these terms excludes liability that applicable law does not allow us to exclude.

8. Termination

You may stop using the app at any time. We may suspend or terminate access where reasonably necessary to address unlawful use, security risks, nonpayment, abuse, or material violations of these terms. Provisions that by their nature should survive termination remain effective.

9. Governing law

These terms are governed by the laws of Vietnam, without limiting mandatory consumer rights or the law that must apply in your country or region.