Oura Ring 4 review: $399 health tracker or expensive jewelry?

Look, I've unboxed enough 'revolutionary' health gadgets to fill a landfill. The Oura Ring 4 is different in one key way: it doesn't pretend to be something it's not. No screen. No buzzing notifications. No constant wrist-checking anxiety. For people who ditched smartwatches because they felt like ankle monitors for your wrist, this is genuinely liberating. The 4-star rating with 9,000+ reviews isn't fluff either; buyers keep mentioning how sleep insights actually shifted their habits.

But here's where the spec sheet says one thing and reality says another. That '50+ health metrics' number? Marketing loves this phrasing. You're actually getting solid data on sleep stages, heart rate variability, body temperature, and activity, legitimately useful. The other metrics are derived or less precise. And the monthly subscription ($5.99 after the first month) isn't optional if you want the insights. That's $72/year on top of your $399 investment. For comparison, a Fitbit costs $130-200 with no mandatory subscription. This thing needs to justify itself fast.

The durability question is where I get nervous. Multiple buyers report battery crashes around the 10-12 month mark, even with Oura's surprisingly good replacement service. One reviewer got a free replacement within days, which is great customer service theatre. But if you're replacing a $399 ring annually, you're effectively paying $470/year all-in. That's not a device; that's a subscription service that happens to ship you hardware.

You get the titanium ring itself (available in five finishes), a charger dock, USB cable, and a sizing kit to nail the fit before committing. The sizing piece is mandatory, standard ring sizes don't apply here because the measurement system is proprietary. Wear it wrong and you're shipping it back. That's annoying but smart engineering: a loose or tight ring ruins the sensor accuracy completely. Battery rated for 5-8 days depending on activity level, charging in about 80 minutes. Water resistant to 100 meters, so shower and pool swimming are fine. Bluetooth connects to iOS and Android apps where the magic (or the endless notifications) happens.

Buy this if you're obsessed with sleep optimization, menstrual cycle tracking, or recovery metrics, and you can stomach the subscription model without wincing. It's legitimately better than smartwatches for hands-on workers and people who want health data without the constant screen glare. Skip it if you're price-sensitive, skeptical of subscriptions, or if you need a device that'll last five years without degrading. The Oura Ring 4 is beautifully engineered, genuinely useful, and fundamentally a premium luxury item wrapped in biohacking language. Know what you're buying.