Legal
LAST UPDATED 28 AUGUST 2026
By using Calmline you agree to these terms. They are short on purpose.
Calmline is not a medical device and does not diagnose, treat, cure or prevent any condition. Heart Rate Variability is an indirect, noisy signal influenced by sleep, exercise, caffeine, alcohol, illness, posture and measurement timing. The stress score is an estimate for personal reflection only. Never use it to make a medical decision, and never delay seeking professional advice because of something this app displayed. If you feel unwell, contact a qualified healthcare professional.
We grant you a personal, non-transferable licence to use Calmline on devices you own, consistent with the Apple Media Services Terms and Conditions.
Calmline Plus is an auto-renewing subscription billed to your Apple Account. It renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel it in Settings → your name → Subscriptions on your iPhone, or through the link inside the app. Deleting the app does not cancel a subscription. Refunds are handled by Apple, not by us.
Calmline depends on Apple Health data recorded by your Apple Watch. If your watch records HRV infrequently, or you do not wear it, the app will have little to work with. We cannot guarantee any particular measurement frequency, as this is controlled by watchOS.
Calmline is provided “as is”, without warranties of any kind to the extent permitted by law. We are not liable for any loss arising from your use of, or reliance on, the app. Nothing here limits liability that cannot lawfully be limited.
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