According to the complaint filed in U.S. District Court for the Northern District of California, Bal was an early investor in Oura, as well as serving as the company’s “primary marketing arm” in its early years as a cash-strapped start-up.

This is the first time the ring has had a serious discount since it was launched. All colourways are on offer, but please note that some are sold more, so their discounted prices are also different. The standard black colourway is the cheapest, with the Gold and Rose Gold colours currently selling for £420.

With an improved design and more features, the Oura Ring 4 has made its way onto my hand for good, but I'm not giving up my fitness tracker just yet

A potential Oura Ring 5 may be a long way out, but I'm already hoping for these key features and improvements.