Oura Ring 4 Review: What I Learned After One Full Year of Wearing It

I've been running since I was 13. That's over a decade of training cycles, and if there's one lesson that took me way too long to learn, it's that the work you put in on the road only matters if your body actually recovers from it. Rest and recovery aren't the boring part of training — they are the training. That's what pushed me to buy the Oura Ring 4 a year ago, and after 12 months of wearing it nearly 24/7, I have a pretty clear picture of what it does well, where it falls short, and who should actually buy one.

Quick context on me: I'm 25, I run consistently, and I've worn an Apple Watch for years. I didn't buy the Oura Ring to replace my watch — I bought it because I wanted recovery and sleep data that didn't require strapping a screen to my wrist every night. Here's how that's gone.

What the Oura Ring 4 Actually Tracks

The app organizes everything into a handful of core categories, and after a year I've spent real time with all of them:

• Readiness — a daily score that tells you how recovered you are and how hard you can push
• Sleep — the deepest sleep tracking I've used on any wearable
• Activity — steps, movement, and automatically detected workouts
• Heart Rate — 24/7 tracking, including your average throughout the day
• Stress — how physiologically stressed your body is, hour by hour
• Resilience — how well your body handles stress over time, not just in the moment

The activity detection is smarter than I expected. The ring picks up on workouts automatically — a run, a walk, whatever — and asks you to confirm them in the app. Once confirmed, they count toward your active calorie burn for the day. You're not manually logging everything, which is exactly what you want from a device with no screen.

The daytime stress feature surprised me the most. It reads your heart rate, HRV, and temperature to flag when your body is under load, and it lines up with real life more often than I'd like to admit. Busy workday, poor night of sleep, hard training block — the graph shows it.

Sleep Tracking Is the Reason I Bought It (And the Reason I'd Buy It Again)

This is the big one for me. I've suspected for a while that I might have sleep apnea, and the Oura Ring has become my way of keeping tabs on it night after night.

Every morning I get a full breakdown: total sleep, sleep efficiency, restfulness, REM sleep, deep sleep, latency (how long it took me to fall asleep), and timing. It also tracks sleep debt, nighttime movement, and — this is the part that matters most for my situation — blood oxygen saturation while I sleep. The ring uses red and infrared LEDs to measure SpO2 overnight, which can flag breathing disturbances.

I'm not using it as a diagnosis, and neither should you, but having a nightly record of my blood oxygen trends gives me real data to bring to a doctor instead of just "I think I snore a lot."

For a runner, the sleep data connects directly to performance. When my deep sleep drops for a few nights in a row, my legs feel it. The ring just gives me the numbers to confirm what my body is already telling me.

Why HRV Matters More Than Your Resting Heart Rate

The ring tracks both heart rate and heart rate variability (HRV), and if you're new to this, HRV is the metric worth paying attention to. It measures the variation in time between your heartbeats, and it's one of the best windows into how your autonomic nervous system is doing. (I wrote a full plain-English guide to HRV if you want to go deeper.)

Higher HRV generally means your body is recovered and ready to absorb training. A suppressed HRV usually means something's off — overtraining, poor sleep, stress, or even an illness before you feel symptoms.

After a year of data, I can look at my HRV trend and know when to push a workout and when to make it an easy Zone 2 day. That's the difference between training hard and training smart, and after 12 years of running, I wish I'd had this in high school.

The Ring Itself: Comfort, Durability, and One Small Quirk

I have the graphite finish, and after a full year of near-constant wear, it still looks close to new. No meaningful scratches, no scuffing that jumps out at me. The Ring 4 is fully titanium with recessed interior sensors, and that build quality shows.

It's small and thin enough that I forget I'm wearing it, which is the whole point. I wear it on my left index or left middle finger and switch between the two occasionally — the readings stay consistent either way. I used Oura's free sizing kit before ordering, and I'd tell anyone to do the same. Oura sizes run differently than standard jewelry, so don't guess.

One thing worth mentioning: I have eczema, and the ring did irritate my skin at first. The fix was simple — I just make sure my hand is completely dry before putting it on, and the issue went away entirely. If you have sensitive skin, that one habit makes all the difference.

The only quirk I've noticed is a faint green LED glow that occasionally bounces off my finger at night. It's subtle, and beyond that, you'd never know the ring is doing anything at all.

Battery Life and Charging

I charge it about once a week. That's it. When the battery runs low, a full charge takes around an hour, so I just keep the charging puck on my desk and top it off while I'm working.

Compared to an Apple Watch that needs charging every night, this is a completely different relationship with a device. The ring stays on through showers, runs, sleep — everything.

The Subscription: The Part Everyone Asks About

Yes, there's a subscription — $5.99/month or $69.99/year — and without it you only get bare-bones daily scores. I understand why that bothers people.

Here's my situation: I have the Amex Platinum, and the digital entertainment credit covers the Oura membership, so my effective monthly cost is zero. If you have that card, it's a no-brainer.

If you're paying out of pocket, the math is roughly $70 a year on top of the $349 ring. For me, the depth of the sleep and recovery data would still justify it, but I get why some people look at subscription-free rings instead. It comes down to how much you'll actually use the insights.

Oura Ring vs. Apple Watch: Why I Wear Both

I still wear my Apple Watch Ultra 2 on runs — nothing replaces live pace, splits, and GPS mid-workout. But the Oura Ring changed how I use it. The watch handles the run; the ring handles everything else. Sleep, recovery, readiness, all-day heart rate — the ring covers it without me needing a screen strapped on 24/7.

The underrated benefit: I can wear a regular watch again. If I want to throw on a mechanical watch for dinner or a normal day, my health tracking doesn't stop. The ring just quietly keeps working in the background. For anyone who likes watches but doesn't want to give up their health data, this setup is the answer.

Frequently Asked Questions

Is the Oura Ring 4 accurate?

For sleep and recovery, it's the best I've used. The Ring 4's sensors adapt to your finger and keep reading even when the ring shifts around at night. For live workout stats, a running watch is still better — the ring is a recovery tool, not a training computer.

Can you shower and run with the Oura Ring 4?

Yes. It's water resistant to 100 meters. I wear mine through showers, runs, and everything in between. The only time it comes off is during its weekly charge.

Does the Oura Ring 4 detect sleep apnea?

It's not a medical device and won't diagnose anything, but the nightly blood oxygen tracking can surface breathing disturbance patterns worth discussing with a doctor. That's exactly how I use it.

How long does the Oura Ring 4 battery last?

About a week for me, with roughly an hour to fully recharge. Oura rates it at 5–8 days depending on ring size and settings, and my experience lines up with that.

Is the Oura Ring subscription required?

Technically no, but without it you lose almost all the useful data. Budget for it — or check whether a credit card benefit like the Amex Platinum covers it, like mine does.

Which finger should you wear the Oura Ring on?

Oura recommends the index, middle, or ring finger. I rotate between my left index and middle with no difference in data quality. Use the sizing kit first — Oura's sizing doesn't match standard ring sizes.

Final Verdict: Would I Buy It Again?

Yes, without hesitation. After a year, the Oura Ring 4 has earned its spot as the one device I never take off. The sleep tracking alone justified the purchase for me, and the recovery data has made me a smarter runner after more than a decade in the sport.

If you're someone who cares about your health and wants to be the best version of yourself — whether that's chasing a PR or just trying to sleep better — this is one of the best tools you can put on your body. It's comfortable enough to forget, durable enough to last, and the data is deep enough that a year in, I'm still learning from it.

The Apple Watch tells me how my run went. The Oura Ring tells me whether I should be running at all today. That second question turned out to be the more important one.