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Samsung Galaxy Ring vs Ultrahuman Ring Air: Which subscription-free smart ring wins?

Samsung just unveiled its subscription-free Galaxy Ring, and the Ultrahuman Ring Air is a competitive subscription-free option. Which should you buy?

There are some innovative features on the Galaxy Ring, like the double-pinch gesture that can dismiss alarms or snap photos with your phone, that you can test out through this device. While you sleep, you want a smart ring that feels slim and unobtrusive on your finger, so it's in a company's best interest to thoughtfully design a product that balances heavy-duty software with lightweight hardware. Based on when I woke up, the Ultrahuman Ring Air would send me notifications about when I should delay caffeine or other stimulants to flush residual adenosine out of my system.

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