The Oura Ring 2 is a wearable smart ring that measures sleep quality, activity, and overall physical readiness. The Finnish based company launched the second iteration of the Oura Ring in 2018. The ring connects via bluetooth to your phone. Data is accessed through Android or Apple apps and via the Oura Cloud web dashboard. There are no subscription models, just pay for the ring (which is more expensive than most trackers) and start measuring performance.

What really sets the Oura Ring 2 apart from other fitness trackers is its advanced sleep tracking capabilities. The importance of consistently getting high quality sleep continues to be proven over and over again. Having a tool like the Oura Ring 2 makes collecting high quality sleep data a breeze. In one clinical test, the Oura Ring 2 went up against a lab grade polysomnography with surprising accuracy for a consumer grade device. 

What Does It Track

Oura CloudThe Oura Ring 2 measures forty-six attributes across three domains: sleep, activity, and readiness.

  • Sleep measures the quality, duration, and efficiency of sleep through attributes like respiratory rate, time awake, and time spent in each sleep phase.
  • Activity measures not just steps taken, but duration and intensity of movement throughout the day. Beyond this, there’s the usual suspects of calories burned, inactive time, and movement by hour.
  • Readiness measures heart rate variability, respiration rate, body temperature, and indexes of overall activity and sleep from prior periods (e.g. last night).

Each domain is scored to summarize overall performance. A score of 85% or higher indicates an optimal balance while lower scores indicate an imbalance or opportunity to tune behaviors.

I’ve found it helpful how Oura breaks down each domain with specific drivers that boost or lower  the overall score. Specifically, the activity domain scores have been eye opening. I’ve been on vacation for a few weeks and consider myself sedentary in general between work and home. That said, seeing just how often I’m inactive was startling. It’s given me the focus to improve my activity score over the next 30 days by frequently getting up and a taking short walks between inactive periods.  

Oura Ring 2 + Fitbit Charge 2 Comparison

There’s a noticeable difference in tracking between the Oura Ring 2 and Fitbit.

I’ve used Fitbit products for several years and have worn a Fitbit Charge 2 for the past 18 months. To gauge the Oura Ring 2’s accuracy, I wore it alongside a Fitbit Charge 2 over a 30 day period.

As you can see in the table below, there’s a significant difference between both devices. The Oura Ring 2 seems to have better accuracy which is reflected by the more refined figures in each category.  

Oura Ring 2Fitbit Charge 2
Hours Asleep313342
Calories Burned85,448108,012

Beyond the basics of heart rate and steps, the Oura Ring 2 has clear superiority of detailed insights into sleep and active time. While Fitbit tends to focus on activity, the Oura Ring 2’s emphasis on sleep and the ability to recover physically provides deeper insights into overall health. 

Refer to the table below for a high level feature comparison between the Oura Ring 2 and Fitbit Charge 2.

Oura Ring 2Fitbit Charge 2
Price~$300-$600 (varies by optional features)~$120
API Access
Heart Rate Variability
Heart Rate 
Time Asleep
Respiration Rate
Airplane Mode
Charge Time & Battery Life~60 minutes wireless  USB-C charging for ~7 days of battery life~60 minutes wired USB charging for ~5 days of battery life
Water ResistanceUp to 100 metersNo
Full SpecsClick hereClick Here


The main points against Oura Ring 2 are its high costs and limited integrations. It’s advanced technology is reflected by its higher entry costs relative to other common wearables like Fitbit and Mi.

Because it has a much smaller user base and is a relatively up and coming product, it has limited integrations, including nothing with Google Fit (although it does integrate with Apple Health).

All data is exportable and it does have API access so this may change over time.

Is the Oura Ring 2 Worth It?

I think so, but your needs may different.

For the casual tracker who just wants to track steps, I recommend sticking with Fitbit or Mi products. These are solid, reliable devices and provide a great entry point to anyone looking to begin a quantified self practice. Another solution to measure heart rate variability (HRV) is Welltory, which I’ve previously reviewed. 

Interested in going beyond the basics? The Oura Ring 2 makes a very compelling case with its sophisticated suite of sensors and detailed reporting.

Oura looks sleek and carries premium features such as the ability to retain up to six weeks of data without a bluetooth connection. This may sound useless but I don’t sleep with any wi-fi/bluetooth/radio enabled on my phone or any other devices in my bedroom. It’s these small details that make the Oura Ring 2 combined with its sophisticated sensors an advanced wearable tracker. It’ll be interesting to see how smart rings fare in the long run with companies like Oura and Motiv opting against the standard watch format.

All things considered, I’m satisfied with the value that my Oura Ring 2 has provided and look forward to seeing what they do next.