Atria

Free open-source iOS app for local WHOOP strap data, no account or cloud

Mobile appfree

Atria is a free, open-source iOS app that reads live heart rate, HRV, strain, and sleep data directly from a compatible WHOOP strap over Bluetooth, without the official WHOOP cloud, account, or subscription. It exports supported data to Apple HealthKit and is explicit about which metrics are personal-baseline estimates versus independently validated. It's for people who own a WHOOP strap and want to keep using its hardware locally instead of paying for continued cloud access.

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