Confused between sticking with your trusty Oura Ring Gen 3 or upgrading to the latest Gen 4? The fitness fans and wellness enthusiasts are buzzing about the enhanced features, and I think it’s time to settle the score once and for all. In this ultimate buyer’s guide, we’ll dive into the hot debate of Oura Ring Gen 3 vs Gen 4 comparison and highlight the key differences that matter. Be it the sleep tracking upgrades or sizing tweaks with new tech perks, we’ll cover them all. If you are curious about the difference between Oura rings, or weighing up the Oura Ring Gen 4 features vs Gen 3, this guide is a must-read. Think of it as the perfect ring-side chat, where science meets a little humour. Let’s find out which smart ring deserves a spot on your finger in 2025.
When you are investing in a gadget for your health and fitness, details matter a lot. For that, let’s move on and get technical with a clear feature and spec comparison of the Oura Ring Gen 3 vs Gen 4.
| Feature | Oura Ring Gen 4 | Oura Ring Gen 3 |
|---|---|---|
| Width | 7.9 mm | 7.9 mm |
| Thickness | ~2.88 mm | 2.7 – 2.9 mm |
| Weight | 3.3 – 5.2 grams (varies by size) | 4 – 6 grams (varies by size) |
| Material | Fully titanium with PVD/DLC coating | Titanium exterior, epoxy interior |
| Battery Life | Up to 8 days | Up to 7 days |
| Charging Time | Approximately 80 minutes | Approximately 80 minutes |
| Sizes Available | 4 – 15 | 6 – 13 |
| Colors | Black, Brushed Silver, Gold, Silver, Rose Gold, Stealth | Black, Silver, Stealth, Gold, Rose Gold, Brushed Titanium (some) |
| Water Resistance | 100m (suitable for water sports, sauna) | 100m (suitable for water sports, sauna) |
| Sensors | Smart Sensing tech with 18 signal pathways, Infrared & Red/Green LEDs, Digital Temperature sensor, Accelerometer | PPG (Red & Green LEDs), Infrared LEDs, Temperature (NTC), Accelerometer |
| Connectivity | Bluetooth LE | Bluetooth LE |
With this detailed comparison table, you can easily decide which is a better pick for your health, lifestyle, and fashion needs. However, if you want to go through a one-on-one battle between these two smart rings, you can continue reading this post.
Time to make the battle of Oura ring Gen 3 vs Gen 4 more interesting by pitting them against each other in various essential departments of a smart ring to find the best one out of them.
Sleep tracking and health metrics are the departments where these smart rings truly shine. The Oura Ring Gen 3 features have already set a high standard with detailed tracking of sleep stages, plus latency and body temperature variations that inform its readiness score.
The Gen 4 takes these metrics a bit higher with enhanced sensor technology. The Oura Ring Gen 4 features up to 30% greater accuracy in blood oxygen monitoring and smarter sleep stage detection via machine learning. The introduction of a new “Stress Score” in Gen 4 for more rounded health insights easily outranks the Oura ring 3 Gen sleep tracking features. Which looks quite basic
Who’s Better: Gen3 or Gen 4?
Both deliver reliable sleep data, but for users like athletes or women tracking cycles or fertility, the Oura Ring Gen 4 features improved heart rate variability and temperature readings, making it a preferred choice.
Sizing is one more key difference between the Oura Ring Gen 3 and the Oura Ring Gen 4 that should be kept in mind while making a selection. The Oura Ring Gen 4 offers a broader size range (4 to 15) than Gen 3’s (6 to 13), accommodating more finger sizes.
The fully titanium Gen 4 serves as one of the most elegant fashion accessories, but feels a little slippery due to its all-metal interior. That’s why several users have chosen one size down at the time of upgrade.
Who’s Better: Gen3 or Gen 4?
Accurate sizing is crucial for comfort and sensor precision, and Oura Ring Gen 4 takes the edge by offering a larger number of sizes. Moreover, its slim and finished profile can be complemented with your jewelry to make an impressive statement. Here is a detailed review from a user sharing his experience with the Oura Ring 4 on Reddit. This review will be quite helpful in determining whether this smart ring performs as claimed by Oura.
“With the 4 I decided to go with as small as possible. The first 4 days I was sceptical did I buy too small and I had to remove it from my finger time to time just because an unpleasant feeling. I did not had any actual physical symptoms. After I got used to it I don’t feel it at all and it tracks everything perfectly.
The battery in the 4 is simply amazing. I get like 6-7 days of battery. I have my charger at my desk so I just pop it in every once in a while when I remember. I think the battery size depends slightly on the ring size so just for the information I have size 10.
I love the automatic activity tracking! It might not be as accurate in calories as my Apple Watch but it does detect all my activities correctly automatically and that’s the most important thing for me. In Apple Watch I have to activate the activity in advance and with Oura I just simply confirm the activities afterwards when I remember. That’s amazing feature!
The stress meter is very eye opening for me and it gives me clues on what actually stresses me out and what helps me recover.
I love my Oura 4 and I would buy it straight away again if it gets lost or breaks.“
Source: r/ouraring (Reddit)
After sizing, we should also weigh the pros and cons of the Oura Ring Gen 3 vs Gen 4 to get a clear picture of which one excels where.
Here is a quick look at the pros and cons of the Oura Ring Gen 3.
| Reliable sleep and health tracking Durable titanium exterior with epoxy inside Good sizing range (6-13) | Older sensor technology Less premium feel |
Now see where the Gen 4 excels and lags.
| Pros | Cons |
|---|---|
| 30% more accurate blood oxygen readings Fully titanium body for durability Expanded sizing range (4-15) | Higher price Slightly slipperier interior Subscription cost |
These pros and cons help you in deciding which one is the best in “oura ring Gen 3 vs Gen 4” battle and make the right selection. Also, have a look at the user review shared as a comment on Reddit that highlights the benefits of using the Oura Ring 4.
“Happy user here as well! I’ve had it for a few weeks now and am loving it. Battery life is great, activity tracking is very accurate (down to the exact distance travel on my bicycle for my daily commute), and I’m enjoying the sleep tracking as well. I feel like a little tamagotchi.”
Source: r/ouraring (Reddit)
After the detailed Oura ring Gen 3 vs Gen 4 one one-on-one fight, let’s explore which Oura Ring will be suitable for your lifestyle.
For most users in the UK, the Oura Ring Gen 4 offers the perfect blend of accuracy, comfort, women’s health tracking, and future platform support, but at a higher price. However, Gen 3 remains a solid pick if you prefer trusted performance with the reliable classic features over the latest features of Gen 4.
Ubuy is the one-stop online shopping platform to buy a diverse range of Oura Rings in the UK.
If you need improved sensor accuracy, comfort, and future features, upgrading from Oura Ring Gen 3 to Gen 4 is worth it.
Oura Ring Gen 4 provides up to 30% more accurate sleep and blood oxygen tracking with its upgraded sensors.
Oura Ring Gen 4 adds a new stress score, smarter period prediction, and better workout heart rate zones that Gen 3 lacks.
Both the Oura Ring Gen 3 and Gen 4 are water-resistant up to 100m, making them suitable for water sports and sauna use, but not diving.
Oura Ring Gen 4 is lighter than Gen 3, with a sleek design that improves comfort compared to Gen 3’s heavier 4g-6g build.
Yes, you can use Oura Ring Gen 3 and Gen 4 using the same Oura app for seamless data sync.
Ubuy content team consist of various writers specializing in different niches. They write blogs about different topics ranging from science, human relationships to the latest technology to share their thoughts, ideas and knowledge with the world.
Get every Newsletter
