Smart Ring Showdown 2025: Oura Ring 4 vs Samsung Galaxy Ring vs Amazfit Helio – Which Wins?
Oura Ring 4, announced in October 2024, features a fully titanium design with recessed sensors, six finishes (Silver and Black at $349; Gold or Rose Gold at $499), US sizes 4–15, and a weight of about 4–6 grams, requiring a