Oura Ring Gen 4 Review: The Most Advanced Sleep Ring Available

The Gen 4 offers meaningful improvements in sleep accuracy (89% vs 85%), battery life, and AI insights. If you’re a power user seeking the most accurate data, the upgrade is worthwhile. Casual users may find the Gen 3 sufficient for their needs.

The Oura Ring Gen 4 achieves 89% accuracy compared to polysomnography (medical sleep studies). This makes it one of the most accurate consumer sleep tracking devices available, though not quite medical-grade precision.

Basic sleep and activity data is available without subscription, but advanced features like detailed insights, trends, and personalized recommendations require the $5.99/month membership. The subscription significantly enhances the value proposition.

For pure sleep tracking accuracy and comfort, the Oura Ring excels over smartwatches. Its form factor allows for more consistent wear and better sensor contact. However, smartwatches offer broader functionality including notifications, apps, and GPS tracking.

In our 30-day testing, the Oura Ring Gen 4 averaged 7.2 days of battery life with all features enabled. This includes continuous heart rate monitoring, temperature tracking, and regular app syncing. Charging takes approximately 80 minutes for a full charge.

Consider alternatives if you need GPS tracking, want smartwatch notifications, have budget constraints, or prefer not to pay subscription fees. Athletes requiring detailed workout analysis might prefer devices like Garmin or Whoop for more comprehensive activity tracking.