Oura Ring Generation 4

The Oura Ring Generation 4 sets a new standard in sleep tracking accuracy, rivaling clinical polysomnography with 95% precision for sleep staging. Priced at $399, it is 70% lighter than the Eight Sleep Pod 4 Ultra and outperforms #2 WHOOP 5.0 in terms of wearability for those who dislike wrist devices. However, the mandatory $6/month membership to access your own data is a pain point, compared to the $30/month fee for WHOOP 5.0, making it a cheaper alternative for data access.