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.

If you haven’t already guessed, we’re talking about the Oura Gen3 Horizon Smart Ring, currently discounted to £165 (saving you 34%) on Amazon UK.

The wearable tech market has exploded in recent years, but amid all the new launches there has been a continued buzz around one piece of kit: the Oura Ring. The sleek smart ring might be small, but it generates a considerable amount of data about everything from sleep to stress.

First came the Oura Ring, which was followed by, most notably, the Ultrahuman Air Ring. After working as a health and fitness journalist for over a decade, I’ve had the privilege of testing dozens of fitness trackers for myself—and tracker rings quickly became my favorite way to collect consistent health data.

But I've also come across some alternative, pretty outstanding, Amazon smart ring deals slipping under the radar. With prices starting at just $56, these Oura alternatives from Samsung, Amazfit, Ultrahuman and more are arguably better value. Even better? They don't require a subscription either.

A travel writer and frequent flier discovered how to avoid jet lag, thanks to her Oura Ring, which is on sale for Amazon Prime Day. Find out how the wellness gadget acts as the ultimate jet lag self-care hack and get one for yourself at Amazon,

Starting today, and extending through July 11 or as long as supplies last, all styles of the Oura Ring 4 are 15% off on Amazon. You can get ring in plain Black or Silver for the lowest price yet of $297.