Ultrahuman Ring Air review: A subscription-free Oura alternative

The $349 Ultrahuman Ring Air offers health tracking without any subscription fees, but the experience could use a little polish. Our review:
Unobtrusive health tracking without a fee in sight
The Ultrahuman Ring Air tracks activity and sleep in a discreet form factor. It costs $349, but there's no monthly subscription fee to use Ultrahuman's services.

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