The Hardware Is Real

Oura announced its fifth-generation smart ring on May 28, 2026, and the size reduction is not marketing fluff. The Ring 5 measures 6.09mm wide and 2.29mm thick — down from 7.9mm and 2.88mm on the Ring 4, according to The Verge's Victoria Song, who handled both in person.

That's a 40% reduction in volume.

The ring is titanium, IP68 rated to 100 meters, and Oura says the new physical vapor deposition (PVD) coating is more scratch-resistant than previous models. The Verge noted some well-earned skepticism on that last point — Oura's scratch-resistance claims have burned buyers before.

Battery life gets a modest bump: six to nine days, up from five to eight on the Ring 4, according to TechCrunch. A new $99 charging case holds five full charges and works with wireless chargers.

The Engineering Story

Getting 40% smaller while improving performance required a complete ground-up redesign.

Oura's VP of Product Maz Brumand told TechCrunch the company rebuilt the mechanical, electrical, optical, battery, and sensing architectures entirely. The LEDs are now four times more powerful. Sensors sit closer to the skin for better signal.

The Ring 5 has 12 signal pathways, down from 18 on the Ring 4. Oura's VP of Product Jason Russell explained to Engadget that the Ring 4 used four low-power photodetectors with low-power LEDs, while the Ring 5 uses three beefier detectors with far more powerful LEDs. Oura says accuracy is better overall. That claim needs independent verification — not just Oura's word.

The Ring 5 only covers sizes 6 through 13, dropping the Ring 4's size 4 and 5 options on the small end and 14-15 on the large end. Oura told Engadget the Ring 4 will stay on sale for those buyers. Some existing customers cannot upgrade at all.

The Price and the Subscription

The Ring 5 starts at $399 for Silver and Black. Premium finishes — Stealth, Brushed Silver, Gold, and the new Deep Rose — run $499. That's a $50 increase over the Ring 4's $349 starting price, per TechCrunch.

And then there's the subscription. Oura charges $6 per month or $70 annually for the app that makes the ring actually useful. Wired confirmed the pricing remains unchanged.

Over three years — roughly the useful life of a smart ring — you're paying $210 in subscription fees on top of $399 for the hardware. Total cost of ownership: $609 minimum. That's before accounting for the charging case.

Rivals like RingConn and Ultrahuman offer zero subscription fees. TechCrunch acknowledged the competitive pressure directly, noting Oura is launching Ring 5 one day before RingConn's Gen 3 began shipping.

The Software Push: AI Everything

Oura is launching Oura Advisor, an LLM-powered health assistant, alongside new features including blood pressure signals, live activity tracking, and GLP-1 medication insights for users on weight-loss drugs, according to The Verge. Wired reported Oura is partnering with Counsel Health to connect users with licensed physicians through the app.

This represents a pivot from passive health tracker to active health platform. AI health coaching is only as good as the data and the medical validation behind it. Oura is making significant claims with limited independent clinical backing.

A free third-party tool called Simple Wearable Report, built by a Reddit user, transforms Oura Ring data into lab-style summaries that can be uploaded to Claude, ChatGPT, or Gemini. ZDNET's Nina Raemont tested it and found that external AI tools like Gemini gave more specific and actionable insights than Oura's own Advisor.

What the Coverage Gets Wrong

Every outlet leads with the size reduction. The coverage is treating Oura's claims as settled fact.

Oura says accuracy improved despite fewer signal pathways. Not verified. Oura says the new coating is more scratch-resistant. Not verified. Oura says the AI health guidance is meaningful. Not verified.

Oura is racing to build a health platform while charging for both hardware and access. If the platform becomes the product, users who cannot afford or will not pay the subscription face a ring that no longer functions as advertised.

Bottom Line

The Oura Ring 5 ships June 4, 2026. If you've been avoiding smart rings because they look like a plumber's fitting, the Ring 5 is worth considering. The engineering is substantial and the size reduction is significant.

You're buying a $399 piece of hardware that requires an ongoing subscription to function as advertised, from a company making AI health claims that haven't been independently validated. The competitors charging nothing for their apps remain in the market.

Read the fine print.