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Skin Temp showing 7-9C when set to celsius #171
Description
NOOP version
8.5.2
Platform
macOS
OS version
Android 16
WHOOP strap model
WHOOP 4.0
Where the data is coming from
Live Bluetooth (strap connected)
Test Centre profile
Not a test-mode bug
What happens
The deep timeline sections shows the temperature however it is most likely scalled wrongly -> there is a slight difference sometimes of the captured metrics but it usually is only within 7 to 9 degrees
What you expected instead
It should properly scale it
Steps to reproduce
- Connect your whoop
- Let it collect some data
- See in deep timeline 7.6C
Strap log
I dont think its needed - i will attach one later if required
Before you submit
- I attached my exported NOOP .zip (not a screenshot of the Live screen). If my bug is a clearly reproducible UI issue I described exactly how to see it instead.
- I attached or pasted a strap log above — or my bug is a clearly reproducible UI issue that doesn't need one (e.g. a typo, a button that does nothing) and I've described exactly how to see it.
- I checked the Troubleshooting guide — especially "history syncs but no data" (most often the strap isn't banking history to flash; charge it to 100% and reconnect).
- I checked the FAQ and — if I'm on a WHOOP 5.0 / MG — the 5.0/MG status page, and this isn't an already-known limit (e.g. SpO₂, or recovery/sleep on the 5/MG).
- I've left out anything personal (strap serial, account email, raw export).
Activity
pagarsky commentedon Jul 10, 2026
Root cause found — this is not a °C/°F conversion bug.
The Add-Device wizard stores the strap's registry model label as bare
"4.0"(AddDeviceWizard.kt:268), but all four skin-temp family resolvers compare the label against the full picker spelling"WHOOP 4.0"(FullDayChartScreen.kt~360,RegistryDayOwnerSource.kt~55,Repository.swift~1452,IntelligenceEngine.swift~1386). For a wizard-paired 4.0 the match always fails, so its samples get decoded with the WHOOP 5/MG raw/100 rule.The arithmetic confirms it: a worn 4.0's raw skin-temp band is 760–865, and /100 gives exactly the reported 7.6–8.65 °C — 34 °C real → 8.46.
Other surfaces hide the bug because analytics gates absolute temps to the plausible 28–42 °C range; the Deep Timeline plots ungated, which is why it shows up only there.
This is the same registry-vs-hardcoded-label bug class as #172/#175 and #178/#179. Fix in PR #180, which centralizes label→family resolution into one documented resolver per platform instead of patching the four comparison sites.
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (ry…
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (ry…
WHOOP 4.0: learn per-device skin-temp anchor instead of assuming raw 826
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (#171…
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (#171…
WHOOP 4.0: learn per-device skin-temp anchor instead of assuming raw …
WHOOP 4.0: learn per-device skin-temp anchor instead of assuming raw …
igorbaikov commentedon Jul 12, 2026
I'm on 8.6.2 and it still shows 8-10c in deep timeline. It doesn't show anything on today->skin temperature. There it says import your history first. I'm confused - I never used whoop app, do I have to for this feature to work? Why does it show numbers on deep timeline then? Is it still bugged?
Don't name the model in the empty-state copy (#623 re-review)
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (ry…
WHOOP 4.0: learn per-device skin-temp anchor instead of assuming raw …
Resolve a non-WHOOP device's family from its brand, not a fall-through (
fix(ui): stop a non-WHOOP device inheriting WHOOP-5 empty-state copy (r…
fix(ui): stop a non-WHOOP device inheriting WHOOP-5 empty-state copy (#…
Fix wizard-paired WHOOP 4.0 skin temps decoding on the 5/MG scale (ry…
WHOOP 4.0: learn per-device skin-temp anchor instead of assuming raw …
Resolve a non-WHOOP device's family from its brand, not a fall-through (
fix(ui): stop a non-WHOOP device inheriting WHOOP-5 empty-state copy (r…
Stop Blood Oxygen promising a reading a WHOOP 4.0 cannot produce
ble: pick the battery source from evidence, not from a guess (#1623)