The Whoop haptic alarm currently starts at full vibration intensity, which can be an abrupt wake-up. I would suggest an option for the alarm to ramp up gradually, starting with a very light pulse and increasing in strength (and/or frequency) over 60 to 90 seconds until dismissed or until it reaches full intensity.
Context: there’s a growing category of standalone vibrating wake-up wristbands being marketed on the idea that a gradual wake-up is less disrupting than an abrupt one. Whether or not the physiological claims hold up, the user experience difference is real and Whoop is already on the wrist and already has the vibrating capabilities. Adding a ramp profile means users don’t need a second device to get the same feature.