Start with what matters.
See recovery, sleep, strain, live heart rate and your daily target in one calm view. Missing evidence stays visibly missing.
- Readiness at a glance
- Live strap connection state
- Clear data blockers

Atria for iPhone · Release in progress
Connect a compatible strap directly over Bluetooth and see live heart rate, recovery, sleep, strain, workouts and trends. Atria works on your iPhone—without an Atria account, cloud sync or subscription.
Your health and fitness history stays in Atria on your iPhone.
Your compatible strap talks to your phone without an Atria server.
Open the app, pair your hardware and begin. There is no Atria login.
Pay once. Atria does not add another fitness subscription.
Built for ownership
Atria gives compatible hardware a useful second life. It reads the signals your strap broadcasts, builds a personal baseline and makes uncertainty visible instead of inventing precision.
No feed. No ads. No cloud profile built around your body.
The full picture
Atria keeps the important surfaces connected, so a number always has context.
See recovery, sleep, strain, live heart rate and your daily target in one calm view. Missing evidence stays visibly missing.

Recovery, resting heart rate, HRV, stress, respiration, sleep and fitness estimates live together—with provenance and availability shown plainly.

Explore day, week and month views for HRV and other metrics. Atria labels the learning period so early estimates never masquerade as settled truth.

Follow heart-rate zones and strain as you move, then save a local workout record you can revisit without asking a remote service for permission.

Log the choices that changed your day and compare them against the signals Atria can actually support. Your notes stay local too.

Local means local
The app has no Atria account, advertising SDK or analytics tracker. Strap readings, derived metrics, journal entries and settings are processed and stored on your device. Data leaves the app when you use an export or authorized Health integration, or if you turn on optional anonymous research sharing after inspecting the bundle. Sharing stays off unless you agree.
Atria 1.0
Atria is a personal fitness and research companion, not a medical device. Do not use it for diagnosis, treatment or safety-critical decisions.
WHOOP is a trademark of WHOOP, Inc. Atria is independent and is not affiliated with, endorsed by or sponsored by WHOOP, Inc.