Image Credit (Oura)Charging on the goThe new charging case makes the Ring 4 more travel-friendly. Oddly, the case won’t be included with the Ring 4, and instead is a £99 addition. Compared with rivals like the Galaxy Ring, Oura’s experience and ecosystem remain its strongest selling point. For anyone who values discreet, jewellery-like health tracking, this could be the most compelling Oura Ring yet. The Oura Ring 4 Ceramic will retail for £499, with the Oura Ring 4 Charging Case coming in at £99.