Your Apple Watch health,
on your device.

iPhone + Apple Watch or WHOOP only

Blood oxygen, heart rate, HRV, sleep, and respiratory rate, read straight from HealthKit on your iPhone and pulled into your encrypted Proto vault. Decrypted only in memory, locked to your own origin, never relayed to anyone.

HealthKit read-only · on-device origin · AES-256-GCM at rest · pull-never-push

How the vault holds

Read straight from HealthKit

The Proto app reads your Apple Watch data directly from HealthKit on your iPhone. No middlemen.

On-device, never sold

Your health data originates on your Watch and stays in your vault. Proto never monetizes or forwards it.

You control access in Health

Revoke permissions any time in the iOS Health app under Sources. Proto reads only what you allow.

Pull, never push

GET-only reads on a 25-day window. Proto never writes back to HealthKit or Apple.

Sync your Apple Watch data. Install Proto on your iPhone, then connect Apple Health. The app reads HealthKit on-device and syncs to your vault.

Get the app Already installed? Open Proto

Your Apple Watch health,on your device.

Your Apple Watch health,
on your device.