Equilibrium

Equilibrium Privacy Policy

Effective date: August 10, 2026

Equilibrium is a stress-monitoring app for iPhone and Apple Watch built by an independent developer. This policy is short because the app’s design makes it short: your data never leaves your device.

What the app reads

With your permission, Equilibrium reads one data type from Apple Health: Heart Rate Variability (SDNN). It does not read anything else, and it never writes to Apple Health.

What happens to it

Your HRV readings are used on your iPhone to compute a personal stress score. The app keeps a short local history of recent scores (to detect sharp rises) and a small snapshot for its widgets. All of this is stored only on your device, inside the app’s own storage.

What the app does NOT do

• No data is transmitted anywhere. The app contains no networking code.
• No servers, no cloud sync, no backups of your health data by us.
• No accounts, no sign-in.
• No analytics, no advertising, no tracking, and no third-party SDKs of any kind.
• Your health data is never sold, shared, or used for advertising — with anyone.

Notifications

Stress alerts are generated locally on your iPhone and, when your phone is locked, mirrored by iOS to a paired Apple Watch. No notification content passes through any third-party service.

Deleting your data

Delete the app. Because everything lives on your device, deleting the app deletes everything the app ever stored. Your underlying HRV readings remain in Apple Health, under your control, as they were before.

Not a medical device

Equilibrium shows patterns in your own data. It does not diagnose, treat, or prevent any condition and is not a substitute for professional medical advice.

Changes and contact

If this policy ever changes, the new version will be posted at this address with a new effective date. Questions: wangwy1105@gmail.com