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Whoop 4.0 vs Whoop 3.0

6 of 6 tracked specs changed between 2019-11 and 2021-09.

What changed: form, battery, sensors, membership, water rating, signature.

Whoop 4.02021-09Whoop 3.02019-11
FormSmaller silk-knit band + battery packBand + on-wrist battery pack
Battery~5 days~3 days
SensorsHR, HRV, SpO2, skin tempHR, respiratory rate
MembershipRequired, $30/moRequired
Water rating10 ATM—
SignatureSilk-knit band, five-day batteryOn-wrist battery swap

Battery figures are launch-day claims.

Newer · Whoop 5.0 / MG vs Whoop 4.0Full Whoop table