Wiki / Health
Oura Ring
Oura Ring is a smart ring that tracks sleep, activity, readiness, and overall health metrics. It's the least invasive health tracker out there, and that's exactly why I love it.
Why it wins: You forget you're wearing it. No bulky watch, no screen lighting up, no charging every night. It just sits on your finger and does its job.
Company Overview
- Founded: 2013
- Headquarters: Oulu, Finland
- Users: Over 5.5 million rings sold worldwide (as of September 2025)
- Valuation: ~$11 billion (Series E, September 2025)
- Revenue: Expected to exceed $1 billion in 2025, up from $500 million in 2024
- Subscription: $5.99/month or $69.99/year for full features
Competition
The smart ring market is growing fast -- shipments projected to jump 49% in 2025, far outpacing smartwatches at 6% growth. Oura is the clear market leader, but competition is heating up.
- Samsung Galaxy Ring - $399, Android-only. Samsung's entry into the ring space. Solid hardware but locked to the Samsung ecosystem.
- Ultrahuman Ring Air - ~$349. No subscription required, which is a strong selling point. Popular with the biohacker crowd.
- RingConn Gen 2 Air - $199. Budget option with AI features. Good entry point for people testing the waters.
Despite the growing field, Oura Ring 4 is still consistently rated the best smart ring available. The sensor accuracy and sleep tracking depth are hard to beat.
What It Tracks
- Sleep - Sleep stages, sleep score, timing, restfulness
- Readiness - Daily readiness score based on recovery, HRV, body temperature
- Activity - Steps, calories, movement goals
- Heart Rate - Continuous heart rate and HRV monitoring
- Body Temperature - Nightly temperature trends
- Blood Oxygen (SpO2) - Overnight oxygen levels
Why I Love It
It's the least invasive health tracker you can wear. No screen on your wrist competing for attention. No vibrations pulling you out of focus. No awkward tan lines from a chunky smartwatch. Just a ring.
The sleep tracking is what sold me. It runs all night without needing to charge daily, the data is genuinely useful, and the readiness score gives you a simple answer to "how recovered am I today" without having to interpret a dozen charts.
The best wearable is the one you actually wear. And a ring you forget about beats a watch you leave on the nightstand every time.