The Oura Ring Gen 3 is the previous generation of Oura's popular smart ring, still widely sold at a reduced price point. It offers reliable HRV, SpO2, skin temperature, and activity tracking in the same discreet titanium form factor. While it lacks some of the Gen 4's sensor upgrades, it remains an excellent entry point for ring-based health monitoring.
Advanced sleep staging with REM, deep, and light sleep analysis
Continuous nighttime HRV with trend analysis
Blood oxygen monitoring during sleep
Not available on Oura Ring Gen 3
No built-in GPS
Daily step and activity tracking
HRV-based resilience and stress score
Automatic activity detection for walks and workouts
Not available — no display
Period prediction via skin temperature trends
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