“It’s like a personal sleep coach on your finger”: Oura Ring 4 vs Gen 3, tested for 6 months

Me 🤝 wearing my ring 24/7 ...

Luna Smart Ring Review: It's Cheaper Than an Oura, but Just As Good

Luna's smart ring comes with a charging case and needs no subscription—but at the moment, it's not available in the U.S. due to ongoing legal action from Oura.