The market of wearables in format of smart ring It is in a moment of maturation and one of the undisputed kings of the sector, Oura, has made a move. With the recent launch of Oura Ring 5the company seeks to protect its throne against some increasingly aggressive rivals.
However, the Oura Ring 4 It is still a very powerful option in stores and often has good offers. If you are thinking about making the leap to invisible technology, we analyze in depth what changes, what remains and which of the two models best adapts at your finger and your budget.
Technical sheet of both Oura smart ring models
|
feature |
oura ring 5 |
oura ring 4 |
|---|---|---|
|
thickness |
2.28 mm (40% more compact) |
2.88mm |
|
broad |
6.09mm |
7.9mm |
|
weight |
Between 2 and 2.69 grams |
Between 3.3 and 5.2 grams |
|
materials |
Aerospace Titanium |
Titanium |
|
sizes available |
From 6 to 13 |
From 4 to 15 |
|
autonomy |
Between 6 and 9 days |
Between 5 and 8 days |
|
Water resistance |
100 meters (IP68) |
100 meters (IP68) |
|
price (from) |
||
|
subscription |
5.99 euros per month (mandatory) |
5.99 euros per month (mandatory) |
The key differences to note


Design: the Oura Ring 5 no longer looks like a device tech
Without a doubt, the greatest evolution of Oura 5 It’s your “slimming“. Although the Oura Ring 4 was already stylish at the time, it still felt like a slightly thick or technological ring compared to a traditional wedding band.
On the other hand, the Oura Ring 5 has achieved reduce its total volume by 40%. At only 2.28 mm thick, it is very discreet and blends perfectly with conventional jewelry.
The largest size of the Ring 5 (2.69 grams) weighs less than the smallest Ring 4 size (3.3 grams). If it could previously be annoying to sleep with the previous model, the new one solves this problem completely.
Of course, you have to be careful with the sizes. To achieve this size, Oura has had to sacrifice options. The Oura Ring 5 It is only available in sizes 6 to 13while the Oura Ring 4 ranges from 4 to 15. If you have very thin or very large fingers, the previous model is still your only option.
Sensors and precision
Both devices use LED light combinations (red, green and infrared) along with temperature sensors and accelerometers to monitor your health 24/7. The difference lies in the physical layout.
By downsizing on Ring 5, the sensors now protrude less but they make better contact with the skin. Oura says that although the Ring 5 traces 12 signal paths (compared to the Ring 4’s 18), its new algorithms and improved component power offer even more accurate and stable heart rate and blood oxygen readings during nighttime movements.
The software does not discriminate (for now)
One of the most honest points from Oura is that the big software news reaches both generations. The ecosystem releases powerful tools such as Health Radar (designed with Resmed to measure nocturnal blood pressure and breathing patterns), the AI medical advisor Counsel Health and metrics for users using GLP-1 weight loss medications. So you won’t miss out on any of these health benefits if you decide to save and opt for the fourth-generation model.
Autonomy: being more compact does not make it impossible for the Oura 5 battery to last longer
It can be thought that a ring 40% smaller would house a tiny battery, but Oura has redesigned the battery to improve autonomy. The Oura Ring 5 promises between 6 and 9 days of actual usescratching an extra day of average autonomy compared to the 5-8 days offered by the Oura Ring 4.
Both models They are loaded using their own basealthough the Ring 5 now has an optional very convenient aluminum travel case, sold separately.
So… which model to choose
The initial outlay of the Oura Ring 5 starts in the 429 euros for its standard finishes (silver and black), scaling up to 529 euros if you are looking for the new premium finishes like Deep Rose. For its part, the Oura Ring 4 is part of the 379 eurosa difference that usually widens when we find specific sales. In both cases, remember add the 5.99 euros per month subscription to unlock your metrics, which is mandatory on both generations.
If you still hesitate between the Oura Ring 4 and the Oura Ring 5, here is the key to choosing.
Buy the Oura Ring 4 if:
- You are looking for the best quality-price ratio: The software, graph and health analysis that you will see on your smartphone are exactly the same.
- You have an extreme size: If your finger requires a size 4, 5, 14 or 15, Ring 5 does not directly manufacture your size.
- You take advantage of an offer: If you find it discounted by a margin of more than 70 or 80 euros compared to the new model, the smart purchase is to go for the previous generation.
Buy the Oura Ring 5 if:
- You are looking for maximum comfort: If you are a light sleeper or are not used to wearing rings, the Ring 5’s smaller millimeters and grams justify paying for the novelty.
- You want it to pass for real jewelry: Its aesthetics are impeccable and the internal sensors are barely noticeable when touched with your finger.
- You want to stretch the battery to the maximum: Its small extra autonomy guarantees you forget about the charger for more than a week.
Some of the links in this article are affiliated and may provide a benefit to Xataka. In case of non-availability, offers may vary.
Images | Oura
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