The Oura Ring Is a $300 Sleep Tracker That Provides Tons of Data

The Oura Ring is a wearable tracker that collects tons of data about your body and sleep. Here’s what you should know if you’re considering it.
The Oura Ring provides highly accurate heart-rate monitoring and solid information on your sleep cycles. But it’s more expensive than many sleep and fitness trackers, and it struggles to log exercise.

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