Products.

Titanium smart ring with recessed PPG sensors, 4–7 day battery, and the most refined sleep and HRV algorithms in the category — behind a paid membership.

Subscription-free smart ring with PPG, SpO2 and temperature sensors, 4–6 day battery and 10 ATM water resistance — full feature set, no monthly fee.

Samsung's first smart ring: titanium, no subscription, deepest Galaxy-phone integration. iOS support is partial — best paired with a Galaxy device.

Subscription-free smart ring from Amazfit. Heart rate, sleep, activity, and AI readiness scoring with no recurring fees. UK launch in 2024.

Value-priced smart ring with no subscription, 10–12 day battery, charging case included — the cheapest credible Oura alternative in 2026.