Oura Ring 4 vs. Whoop 5.0

I first compared Oura and Whoop about four years ago. Back then I preferred the Oura Ring for sleep tracking but had real questions about Whoop's accuracy. A lot has changed. I've now worn the Whoop 5.0 for a full year. I wore the Oura Ring 4 every day for more than two months, then switched to wearing it just at night for sleep. Both devices got major upgrades, but my recommendation has flipped.

One quick note before we get into it. Oura just launched the Oura Ring 5. It's about 40% smaller and a lot thinner than the Ring 4, down to 2.28mm, which Oura is calling the world's smallest smart ring. That should make it more comfortable all day and less annoying to lift in, which were two of my biggest complaints below.

The price jumped to $399 from $349, the $5.99 monthly subscription is still mandatory, and most of the new software is also coming to the Ring 3 and Ring 4. So it reads as a design refresh, not a reinvention. I'm buying one soon and I'll redo this comparison once I've worn it. For now, everything below is the Ring 4, and most of it carries straight over.

Four years ago, Oura was the clear winner for sleep and recovery. Whoop's deep sleep tracking was way off, and the recovery scores didn't match how I felt. The 5.0 fixed most of that. The Ring 4 improved too, with recessed sensors, a redesigned app, and better battery life.

But after wearing both side by side, the gap closed in Whoop's favor for anyone who takes fitness seriously. It feels like Whoop kept getting better while Oura coasted on what they already had. The Ring 4 is basically the same product as four years ago, except the app is harder to use and now there's a subscription fee.

1. Design & Comfort

The Oura Ring 4 is a titanium ring about the size of a thick wedding band. My wedding ring is thin titanium and I barely notice it, but the Oura is noticeably bulkier.

I went with the silver finish and wish I hadn't. It's shiny in a way that looks tacky, so I'd grab a brushed finish if I did it over. The ceramic options look nicer but cost an extra $100.

The comfort issue that surprised me most was lifting. The ring sits between your finger and the barbell and I could feel every rep. My wedding ring already bugs me enough that I switch to a silicone band to lift, and the Oura is worse.

It catches on everything outside the gym too, my phone, my keyboard, the dumbbells. Durability has held up though. Two months of that and it's covered in micro scratches but still looks fine.

Finger placement matters more than you'd think. The index finger was the sweet spot for me, but I'd sized the ring for my ring finger, so it doesn't fit my index. You're stuck with whatever size you order, and the sizing kit won't tell you which finger you'll actually prefer until you've worn one for a week.

The Whoop 5.0 sits on your wrist an inch above the wrist bone, and it's a huge upgrade from older versions. It's so thin and light it feels like a regular Apple Watch, and better than the bulky Ultra. The default band still needs regular cleaning or it starts to smell, but there are nicer options now.

The ring's real edge is that it's discreet. Nobody looks at a ring twice, so if you just want tracking that blends in, it disappears. I'm the opposite, wearing a Whoop, an Apple Watch, and a ring all at once, which looks ridiculous but comes with the job. If you like a traditional watch or don't want more stuff on your wrists, the ring is the play.

And like I said up top, the Ring 5 should fix a lot of this. A thinner frame takes the edge off the bulk and the lifting, at least in theory. I won't know for sure until I've worn one.

2. Sleep Tracking & Recovery

Oura has always been strong here, and the Gen 4 keeps that going. It detects when you fall asleep and wake up and breaks your sleep into light, REM, and deep stages. Every morning you get a readiness score based on your HRV, resting heart rate, body temperature, and respiratory rate. It averages your HRV across the whole night instead of weighting one sleep stage, which I've always thought was the smarter approach.

Whoop caught up. The 5.0 clearly fixed how it measures deep sleep. With older versions I was consistently seeing just 42 minutes of deep sleep a night, which felt way off. Now it almost always feels right. And because the sleep stages are finally accurate, the recovery scores make sense too. About 95% of the time, Whoop's recovery matches how I feel.

Oura's readiness scores feel like they're playing it safe. After more than two months of testing, mine barely moved. I sat at 85 or 86 almost every single day. My lowest was a 77 after a terrible night. My highest was a 91. They never gave me a 100 either. That's a 14-point range.

Whoop's recovery scores swing way more, and the swings match how I feel. If I sleep poorly and drink a beer, Whoop hits me with a 30% recovery. Oura would probably still give me an 80. It feels like Oura is too afraid to give an opinion.

One hardware issue: if your ring shifts at night and the sensor moves off the palm side of your finger, your heart rate readings drop out. I saw big gaps in my overnight heart rate graph about a third of the time. That could be affecting the readiness scores too. Whoop doesn't have this problem because it's strapped to your wrist.

Whoop's daily questionnaire is its best recovery feature. Each morning you answer a few questions about the day before. Did you drink? Caffeine late? Heavy meal?

After a couple weeks, it shows you which things actually move your recovery. I learned one beer destroys my HRV the next day. I also found out a focus supplement I was testing tanked my recovery every time. Oura has tags you can add to your days, but the app doesn't do anything useful with them. There's no real reason to tag anything except for your own memory.

Whoop also caught me getting sick before I felt anything. My recovery tanked one day, and the next morning I got hit with a nasty flu. Over the next two weeks I watched my numbers climb back up each day as I recovered.

The Oura app redesigned into three tabs: Today, Vitals, and My Health. It looks clean, but even after months I still can't always find what I'm looking for. Whoop's layout is more organized. Oura does have one notification I liked, a "time to stretch" reminder similar to the Apple Watch stand rings. Whoop has nothing like that.

Here's the most telling thing. After more than two months wearing all three devices at once, I have zero urge to open the Oura app. The only reason I checked it was to write this review. With Whoop, I open it every morning without thinking. That says something.

For sleep comfort, the order is clear: Oura first because you forget it's there, Whoop second because it's thin enough not to bother me, Apple Watch last.

Check Whoop 5.0 price →

3. Activity Tracking

Whoop auto-detects workouts from your heart rate and wrist movement. Once you log your first few sessions, it learns your patterns and starts catching everything on its own. There were some funny misses, like tagging me playing with my kids in the yard as snowshoeing and my lawn mowing as mountain biking, but it nails detection about 90% of the time.

Whoop also lets you live-track a workout on your phone, with real-time heart rate and strain between sets.

Whoop's strain score tells you how hard to push each day based on how recovered you are. Crushed it yesterday? It tells you to take it easy. Well rested? It tells you to go harder. You even get a haptic buzz when you hit your optimal strain mid-workout. For someone like me who exercises daily and tends to overtrain, that's actually useful.

The ongoing problem with Whoop is weight lifting accuracy. After a year with the 5.0, my average heart rate during lifting was consistently lower on Whoop than on my Apple Watch. When the watch showed spikes to 160 BPM on a heavy set, Whoop showed a flatter 110-120 BPM.

Whoop uses a slower 26Hz sampling rate to protect its 14-day battery, which smooths out the rapid spikes you get in lifting. Three generations of hardware and it still isn't fixed.

Whoop added a "muscular load" feature to make up for it. You manually enter your exercises, reps, sets, and weight after a session, and it adjusts your strain. A typical push day Whoop scored at 4-5 more than doubled once I entered the full workout.

You can save presets if you do the same routine each week, but if your workouts change a lot, it takes at least five minutes a session. I used it a handful of times and stopped. Too much work.

Oura's activity tracking is a step below both. When you start a "live workout" in the app, it's literally just a timer. No heart rate, no metrics, nothing. Everything is after the fact.

The app sometimes notices you were active and suggests you log it, but it doesn't know what activity you did like Whoop does, and the time windows are often wrong. You end up staring at the heart rate graph trying to remember what you did at each spike, then fixing the times and picking the activity yourself.

Here's the weird part. Your activity goals depend on whether you logged the workout. I had an intense Peloton session, and by the end of the day Oura said I was only halfway to my goal because I hadn't logged it yet.

The ring tracked my heart rate the whole time. Nothing changed about what my body actually did. But the second I logged it, my activity ring filled up. That feels broken.

Oura hits the same sampling problem as Whoop. The battery is so small relative to the ring that it can't sample fast enough to catch lifting spikes. Between the after-the-fact logging, the sampling limits, and the broken goals, I'd put Oura's activity tracking below most budget fitness bands. It's an okay step counter. That's about it.

This is why I stopped wearing the ring during the day. If you have an Apple Watch, the best setup is to use the Oura Ring as a sleep-only device and let the watch handle everything else.

Oura pulls your Apple Watch data in through Apple Health, so even when I only wear the ring at night, it still knows what I did during the day. It can see when I exercised and how active I was, which makes the sleep and readiness data more useful because it has context. You get Oura's sleep tracking overnight, the watch handles the day, and you don't have to wear a ring while you lift.

4. Battery Life

Whoop's battery is listed at 14 days, and I consistently got right around that. The slide-on pack that charges while you wear it is still one of the best ideas in wearable tech. When I get the three-day warning, I slide the pack on for an hour and forget about it for another 10-11 days.

The Oura Ring 4 is listed at 5 to 8 days and I averaged about 5. That's less than half of Whoop, but for a ring this small it's impressive engineering.

The catch is there's no way to charge it on your finger. You take it off, find the charger, and wait. And with no screen or buzz, it's easy to forget you're not wearing it. You have to treat it like a wedding ring and just remember to put it back on.

Price Comparison

Oura's subscription is mandatory for most of the useful features. Without it you get basic sleep tracking, but no readiness scores, no detailed HRV, and no trends. At $5.99 a month or $69.99 a year, it adds up.

On a two-year basis, the two are nearly identical. By year three Oura is cheaper, because you're not buying new hardware while Whoop keeps charging $239 a year. Whoop also has a cheaper One tier at $199 a year, or a pricier Life tier at $359.

The Ring 4's real value is used. You can regularly find it new on eBay for around $250, which is where I got mine. Now that the Ring 5 is out, Ring 4 prices should drop even further, which makes it a much better deal if you don't care about the new thinner design.

Here's the strange part though. Oura is still selling the Ring 4 new on their own site for $349. That makes no sense. Why pay $349 for last year's ring when the Ring 5 is $399? Just spend the extra $50 and get the newest, thinnest tech. That goes double if you lift. The slimmer Ring 5 is the one you'd want sitting under the barbell.

See Oura Ring 5 price →

Which one should you buy?

If I had to own just one, I'd take the Whoop. It handles workouts and recovery on its own without leaning on anything else, and if you're reading a post like this, that's probably what you're after. Most people reading this don't already wear an Apple Watch. If you did and you liked it, you probably wouldn't be shopping for a tracker in the first place.

So the Oura Ring really only makes sense in two cases. You already have an Apple Watch and want sleep tracking on top of it, since the ring reads your watch data through Apple Health and Whoop can't. Or you wear a regular watch and don't want a fitness band crowding your wrist. Outside of those, get the Whoop. And if you're not sure you need any of this, a cheap fitness band covers steps and sleep for a fraction of the price.

Either way, be clear on what the ring is. It's good for sleep and good for telling whether you're awake and moving during the day, but terrible if you want to track a run or live-track a strength session. Lean on it for sleep, not the full fitness picture.

Personally, I don't lose sleep over sleep tracking. My Eight Sleep handles mine and it's not the most accurate, but I don't care, and a low readiness score just psychs me out on mornings I feel fine. Worth saying before you drop $400 chasing a number.

Oura also just added Stelo glucose tracking, the same thing Levels Health does. Based on the rest of the app, I'd put my money on Levels doing it better.

Affiliate Disclosure

I bought both the Oura Ring 4 and my Whoop 5.0 membership with my own money. If you use any links in this post to sign up, I may earn a commission. Using my links supports my content and I appreciate it.