Whoop 4.0 vs Whoop 3.0

4 of 7 tracked specs changed between 2019-05 and 2021-09.

What changed: form, battery, sensors, signature.

Launch prices are historical. Price links may earn us a commission. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.

	Whoop 4.02021-09	Whoop 3.02019-05
Launch price	$30/mo membership	$30/mo membership
Weight
Form	Smaller silk-knit band + battery pack	Band + on-wrist battery pack
Battery	~5 days	~3 days
Sensors	HR, HRV, SpO2, skin temp	HR, respiratory rate
Membership	Required, $30/mo	Required, $30/mo
Water rating	10 ATM	—
Signature	Silk-knit band, five-day battery	On-wrist battery swap

Battery figures are launch-day claims.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.