Not even Apple has anything like it: this ring measures heart rate and much more, and it's discounted on Amazon.

Many people still associate health-tracking technology with fitness trackers or smartwatches, those that fit on your wrist and bombard you with notifications. The truth is that miniaturization has gone a step further, and there are already several smart rings on the market that do the same, or even more, in a much more discreet way.

One of the pioneers and great references in this field is the Oura Ring, and its third generation, the Gen3 Horizon , has become the object of desire for those looking for precise health tracking without sacrificing style. And the good news is that, although its initial price was high, it can now be found for 155 euros in various colors and sizes , a considerable reduction that puts it within reach of many more budgets.

The Oura Ring Gen3 Horizon is, at first glance, a sleek and minimalist ring. Made of titanium, it's lightweight, durable, and so comfortable you'll forget you're wearing it. But inside it hides a miniature laboratory: a set of high-precision sensors that monitor your body 24/7.

Unlike bracelets, which measure from the wrist, the ring measures from the finger, an area with better blood flow that allows for more reliable data on heart rate , body temperature, and blood oxygen saturation.

Its specialty is sleep analysis. While you sleep, the Oura Ring records the different stages of sleep—light, deep, REM—, heart rate, heart rate variability (HRV), and body temperature. Using all this data, the Oura app gives you a "Readiness" score every morning, which tells you how recovered you are and whether it's a good day to go all out at the gym or if you should take things a little easier.

Everyday uses

The Oura Ring also tracks your daily activity: steps, calories burned, and inactivity . It's not as comprehensive as a sports watch for recording specific workouts, but it does give you a comprehensive overview of your activity level and encourages you to move more. It also automatically detects naps and adds them to your sleep score, something few bands do with such accuracy.

Another of its star features is menstrual cycle tracking for women. Using body temperature fluctuations, the ring can predict the start of your period with surprising accuracy, giving you advance warning so you can prepare. It's a very useful tool that goes beyond simply counting days on a calendar.

The Oura app is the brain of it all. It's intuitive, visually appealing, and presents data in an easy-to-understand way. It doesn't bombard you with incomprehensible graphs, but instead offers daily, weekly, and monthly summaries with actionable tips for improving your sleep, activity, and overall well-being. It also integrates with other health apps like Apple Health and Google Fit, so you can have all your data centralized.

The battery lasts between 4 and 7 days, depending on usage, and charges in just over an hour on a small wireless charging pad . This means you don't have to worry about charging it every day, as is the case with many smartwatches.