The global smart ring market is expected to grow from USD$314.52 billion in 2023 to USD$2,570.30 billion (£2,012 billion) by 2030. It is no surprise that neither Samsung nor Apple are pioneers in this new wearable technology. Oura was launched in 2015 with a Kickstarter campaign for the first generation ring. The ring can measure respiratory rate, heart rate, health rate variability, blood oxygen levels, and body temperature.