u/Bastikuhn

Chatting with AI about my future with Whoop after six years, the AI stated that

Since Whoop 5, the rate changed from 100 Hz to 25 Hz to save battery. Which makes the rate while working out lower than the Apple Watch's rate and therefore leads to that lower performance compared with AW.

Yes, that AW is better with HR tracking. I read more than once, but did they reduce the performance deliberately? Is that AI hallucination or true?

Here the table:

Device	Sampling Rate	Sensor Type	Wear Location
Polar H10 (chest strap, reference)	1000 Hz	ECG	Chest
Polar Verity Sense	135 Hz (SDK mode) / ~55 Hz default	Optical (PPG, 6 LEDs)	Upper arm
Apple Watch	Several hundred Hz during active measurement (not officially disclosed)	Optical (PPG)	Wrist
Whoop 5.0	26 Hz	Optical (PPG)	Wrist
Whoop 4.0	Advertised as 100 Hz, actual rate unclear	Optical (PPG)	Wrist