I put together a detailed comparison table for the main screenless fitness trackers currently on the market: WHOOP 4.0, WHOOP 5.0, Amazfit Helio Strap, Polar Loop, Fitbit Air, and Garmin CIRQA.
The table compares dimensions, weight, battery life, pricing, subscriptions, sensors, sleep and recovery features, workout tracking, GPS, heart-rate broadcasting, and supported wearing positions.
I also separated mandatory and optional subscriptions, since the real cost of ownership differs significantly between these devices.
Full comparison: https://docs.google.com/spreadsheets/d/1M7rADGL5Lz9WiJp3SJN96BEs0TDECn0J5amvC-VKwTk/edit?usp=sharing
