goose

Goose is an independent iOS app that talks to a WHOOP 5.0 band over Bluetooth and keeps all of your health data on the phone instead of in WHOOP's cloud. Sleep, recovery, strain, stress, cardiovascular load, it pulls the same metrics the official app shows, processes them locally in a Rust core behind a SwiftUI interface, and adds a Coach view that summarizes what the numbers mean. The pitch is data ownership: your biometrics stay on your device.

That local-first design is the entire reason to care. WHOOP's own app routes your data through their servers; this does not. For people who want the recovery and strain numbers without handing a company a continuous feed of their physiology, that is a meaningful difference.

But be honest about the stage. This is an alpha proof-of-concept aimed at developers, the author openly flags significant performance issues, and the first TestFlight beta is not expected until mid-June 2026. This is something to watch and tinker with, not something to rely on yet.

The bigger catch is licensing. There is no LICENSE file in the repo, which means that despite being public it is not actually open source: all rights are reserved by default. Until the author adds a license, you cannot legally fork, modify, or build on it. For a project whose whole appeal is control over your own data, that is the gap to fix first.