Warning
WHOOP users: do not reconnect to the official WHOOP app.
If you use OpenStrap or another open-source app, or plan to switch to one later, do not connect your band to the WHOOP app again. It can install firmware updates automatically. Uninstall or disable the WHOOP app to prevent it from updating your band.
Users report blocked data access on WHOOP 5.0 / MG firmware 50.43.1.0 and 50.43.2.0. Bluetooth may still connect while history or live data is withheld. OpenStrap cannot issue the WHOOP-signed membership token needed to unlock an affected band. See firmware compatibility for the evidence and its limits.
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| Today | Health | Sleep | Heart rate | Workout |
Supported: WHOOP 4.0, 5.0, MG, subject to the firmware restrictions below.
Being built: Oura Ring, Garmin, Pebble, Colmi, Ultrahuman, Mi Band and more.
Full feature list: docs/FEATURES.md.
Research checked on November 9, 2026. These are community observations, not a complete list of affected firmware versions.
| Device / firmware | Evidence |
|---|---|
| WHOOP 5.0, 50.43.1.0 | A November 7 OpenStrap report describes successful Bluetooth connections and command replies, but no history or live HR. Data resumed after the official app installed a WHOOP-signed membership token. |
| WHOOP 5.0 / MG, 50.43.2.0 | A November 3 NOOP report describes history stopping after the update while live HR and beat timing still worked. This is a reported sync failure; its token-related cause has not been established. |
| WHOOP MG, 50.42.1.0 | A November 1 report records certificate commands and a 45-day certificate counter. It does not establish when enforcement began. |
| WHOOP 4.0 | These reports do not establish that the same signed-token restriction affects 4.0. Avoid reconnecting it to the official app too if you want to preserve open-source compatibility. |
The 50.43.1.0 report describes a device-bound token signed by WHOOP using ES256, a public/private-key signature scheme. The band checks WHOOP's signature; creating your own key pair cannot produce a token it will accept. The reported failure occurs after Bluetooth connects, when the band withholds sensor data. The reporter's token lasted about 45 days, but what happens at expiry or when membership ends remains unverified. OpenStrap cannot mint or renew these tokens.
Release timing: users reported receiving 50.43.1.0 on October 19, 2026. WHOOP's release-notes page is dated October 26, 2026 and lists 50.43.2.0 as current. WHOOP says updates are automatic and phased, but provides no release date for each version or mention of this restriction. The exact rollout start and first enforcing version are unknown. October 19 establishes that 50.43.1.0 was available by then; October 26 is the page date, not a confirmed firmware release date.
If your band has already updated, the version alone does not prove it is locked. If you plan to switch to OpenStrap later, keep your band off the official WHOOP app in the meantime. We are working on a solution, but no fix is available yet. These reports do not establish a reliable downgrade.
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