Blue Flash Rings— •?•?•?•?•?•?•?•?•?•?•?•?•?•?•?•?—— •?•?•?•?•?•?•?•?•?•?•?•?•?•?•?•?—Longevity and Advantage: Oura Ring’s battery everyday living is sound, but the need for a subscription to access app options and its bulkier structure make it less consumer-pleasant as oppos