Review: Oura Ring 3 and Whoop 4.0 are 2 ambitious wearables, but they’re tough sells

The Whoop 4.0 has a more traditional design: It’s a small, black, rectangular tracker that comes with a woven black band. The module itself has nine sensors. While Whoop offers a fun variety of band and clasp colors to choose from—a black band with a golden clasp can look particularly classy—the whole package still screams “fitness tracker.” But if you don’t mind the sportier aesthetic—and the inevitability of lighter bands getting dirty and changing colors, even with handwashing, as Whoop recommends—this is among the nicest-looking fitness trackers I’ve tested. It’s easily one of the most comfortable I’ve used, too.

It isn’t the most intuitive design, though. It took me a few minutes to figure out how to assemble the Whoop, and it came apart easily while I was putting it on. The cloth band at times became soaked with sweat during workouts, and the material took longer to dry than a typical silicone band. It’s not something you want to leave on your skin while air-drying, either.

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Notably, Whoop also sells a small, optional line of sportswear that can house the device, so you don’t have to wear it around your wrist. The selection includes bras, underwear, shirts, bicep bands, and arm sleeves. I slotted the tracker within the Whoop boxers, for instance, and found the setup comfortable. The tracker sits offset from the center, so it doesn’t make contact with any bones. This made it virtually unnoticeable during workouts.

As far as tracking goes, both Oura and Whoop promise to measure your body temperature, heart rate, and SpO2 (blood oxygen) levels, though blood oxygen readings have yet to launch on the Oura Ring. Both devices are water-resistant; Oura says the third-gen Ring can withstand up to 100 meters of water, while Whoop says the 4.0 is IP68-rated and can handle up to 10 meters for two hours. The Whoop 4.0 also has vibration motors exclusively for a handy silent alarm feature. Neither device has much in the way of smartwatch-style features, though. That’s not a surprise given each wearable’s lack of a screen, but don’t expect any email notifications or contactless payments here.

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