Smart ring

Wearable electronic device A smart ring being worn A smart ring is a compact wearable electronic device that resembles a jewellery ring. They are often fitness and sleep trackers that wirelessly pair with a smartphone to transfer data. Many can also alert the wearer to smartphone push notifications. Some smart rings are used for near-field communication (NFC) applications such as contactless payment and access control, similarly to chip cards. Smart rings may include other sensors such as GPS trackers. Smart rings can connect to smartphones or other devices, and some can operate independently, communicating with cloud computing systems or performing standalone tasks. Although many are displayless, they respond to contextual cues, such as gesture controls or proximity to NFC touchpoints, and can give haptic feedback. Uses Use cases for smart rings are varied, and comparable to those of smartwatches. Health Many smart rings have sensors to track health metrics such as steps, heart rate, temperature, sleep (through heart and motion sensing), and blood flow. Due to size constraints, smart rings typically include smaller and less accurate accelerometers, and smaller batteries, than smar