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Circular Ring Review 2024: How Accurate Is It?

In an age where tracking health and fitness is a widespread habit among active people, the Circular Ring stands out as an innovative leader in wearable technology. Renowned for its precision and effectiveness, Circular Ring provides personal health monitoring in a sleek and unobtrusive design.

Available in two different versions, the robust Circular Pro 1 and the ultra-slim Circular Slim — it delivers unique capabilities and precision. Each version boasts distinctive features, catering to a wide range of preferences and lifestyles.

In this article, we will explore the Circular smart ring and its different versions to understand how these devices live up to their promise of transforming personal health tracking.

How did we evaluate the Circular smart ring?

In our comprehensive Circular smart ring review, we analyzed these particular criteria:

User experienceEase of use and comfort
FeaturesHealth tracking
DesignAesthetics and build quality
Overall performanceAccuracy of health data and battery life
  • User experience. We focused on how intuitive and comfortable the ring was to use daily.
  • Features. We analyzed the ring's various health-tracking capabilities, such as heart rate tracking, blood oxygenation (SpO2), heart rate variability (HRV), and others.
  • Design. We assessed the ring's aesthetics, build quality, and comfort.
  • Overall performance. The accuracy of health data and battery life were key factors in our overall assessment.

What is Circular smart ring?

The Circular smart ring represents a significant advancement in the realm of wearable technology. It's a compact, high-tech device worn on the finger, designed to seamlessly integrate health and wellness monitoring into daily life. The ring's primary function is to track various health metrics, including heart rate, oxygen saturation (SpO2), heart rate variability (HRV), and temperature, providing users with valuable insights into their physical well-being.

Circular offers two distinct versions of its smart ring: the Circular Pro 1 and the Circular Slim.

Circular Pro 1 vs. Circular Slim

The Circular Pro 1 is the original model, known for its robust feature set and comprehensive health tracking capabilities. In contrast, the Circular Slim, as the name suggests, is a more refined version, offering a slimmer and lighter version. It's designed for users who prioritize sleekness and minimalism without compromising on functionality.

Circular — the company behind these innovative rings is committed to enhancing personal health and wellness through wearable technology. They focus on creating devices that are not only technologically advanced but also aesthetically pleasing and comfortable to wear, making health tracking an effortless part of everyday life.

This overview sets the stage for a more detailed exploration of the Circular smart rings, highlighting their role in the evolving landscape of wearable health devices.

Circular Ring Slim comm block

Main features of the Circular smart ring

Circular is a cutting-edge smart ring, blending style with advanced health and wellness tracking features to support a healthy lifestyle.

24/7 health tracking

Circular smart ring delivers comprehensive health monitoring around the clock. It tracks key metrics such as heart rate, blood oxygen saturation (SpO2), heart rate variability (HRV), and body temperature, providing users with a detailed overview of their physical well-being. This continuous tracking allows for a deeper understanding of one's health patterns and may encourage healthy habits. The ability to monitor these vital signs continuously sets the Circular smart ring apart from many other wearables, offering users a more holistic view of their health.

Sleep, energy, and activity improvement

Circular ring is not just a health tracker — it's a personal wellness assistant that may help improve sleep, energy, and activity levels by providing personalized insights and recommendations. The device also has the ability to analyze sleep patterns and can assist in optimizing sleep schedules for better rest and recovery.

Its energy tracking feature can help users understand their energy fluctuations throughout the day, enabling them to manage their activities more effectively. Lastly, the ring's activity tracking encourages a more active lifestyle, making it a comprehensive tool for overall wellness enhancement.

Design and comfort

In terms of design, the Circular smart ring stands out with its sleek and minimalist appearance. The Circular Slim, in particular, boasts a slim and light smart ring, measuring only 2.2 mm thick and weighing only 2 grams. This design makes the device aesthetically pleasing and comfortable to wear throughout the day and night. The emphasis on design and comfort sets up the Circular smart ring as an appealing choice for users who value style and functionality.

Smart features and haptics

The Circular smart ring is equipped with smart features like notifications, reminders, and guided breathing exercises. These features are designed to integrate seamlessly into the user's daily routine, providing gentle haptic feedback for alerts. They can also enhance the user experience by offering practical, everyday applications beyond health tracking. For instance, guided breathing is a standout feature, helping users manage their mood and mental health through breathing exercises.

The Circular smart ring experience: diving deeper

To go further with our Circular smart ring review, we delved into its design, accuracy, comfort, and battery life, comparing the nuances of the original and slim versions.


The design of the Circular smart ring is a harmonious blend of aesthetics and functionality. Both the original and the slim versions boast an appealing, minimalist look, catering to users who value style alongside technology. The slim version, in particular, stands out as the thinnest and lightest smart ring in the market, a testament to the brand's commitment to innovative design.

The materials used strike a balance between durability and elegance, ensuring the ring can withstand daily wear while maintaining a sophisticated appearance. The overall build quality is high, reflecting Circular's attention to detail and understanding of wearable tech's need to be sturdy and stylish.


Accuracy is a cornerstone of the Circular smart ring's functionality. It excels in tracking a range of fitness metrics, including heart rate, SpO2, and HRV, with high precision. This accuracy is crucial for users relying on the ring for health and wellness insights, as it provides reliable data for informed decision-making.

The ring's ability to continuously monitor these metrics allows for a comprehensive understanding of the user's physical state, making it a valuable tool for fitness enthusiasts and those monitoring their health.

However, it is important to note that research on these types of devices is still in the early stages. This makes it difficult to fully measure the level of their accuracy for the time being.


Comfort is a crucial factor when it comes to smart rings or wearable technology in general. Circular smart ring addresses this with its ergonomic design. Both versions are crafted to ensure comfort during extended wear. The slim version, in particular, is lightweight and unobtrusive, making it feel almost imperceptible on the finger.

The choice of materials and the ring's sleek profile contribute to a comfortable fit, minimizing any inconvenience or irritation that can often accompany wearable devices. This focus on comfort makes the Circular smart ring suitable for continuous wear, day and night.

Battery life

Circular smart ring is designed to last from 2.5 to 8 days, depending on the chosen data mode, which reduces the need for frequent charging. This longevity is particularly beneficial for those who rely on the ring for consistent health monitoring. However, some user reports suggest there is room for improvement in this aspect.

The battery performance varies slightly between the original and slim versions, with the slim potentially offering a slightly shorter battery life due to its reduced size. Both models are engineered to ensure that battery life does not impede the user experience, providing a reliable and hassle-free wearable experience.

Circular ring app: an overview

The Circular Ring app is the digital companion to Circular Pro 1 and Circular Slim rings, enhancing the user experience through advanced features and seamless connectivity.

Main features

The Circular Ring app is a complementary platform tailored to maximize the power of the smart ring. It offers comprehensive health tracking features, including monitoring heart rate, SpO2, HRV, and body temperature, providing users with detailed insights into their physical well-being. The app also includes sleep, energy, and activity tracking, helping users optimize their daily routines for better health outcomes.

Additionally, it offers personalized recommendations and insights based on the collected data, making it a valuable tool for health-conscious individuals. The app's user-friendly interface allows for easily accessible features.

Connecting the ring and the app

Connecting the Circular smart ring to its app is a straightforward process. Here are the following steps:

  1. Users need to download the app from their respective app stores and create an account.
  2. Once the account is set up, the app guides users through the pairing process, which involves activating the ring's Bluetooth function and syncing it with the app. This process is designed to be intuitive, ensuring that users of all tech levels can easily connect their ring and start tracking their health metrics immediately.

The seamless integration between the ring and the app is a key aspect of the Circular experience, allowing for real-time data synchronization and updates.


The interactivity between the Circular smart ring and its app is a standout feature. The app's interface is crafted for easy use, providing a smooth and intuitive user experience. It displays the data collected by the ring in a clear and simple format, allowing users to quickly grasp their health metrics and trends.

The app also enables users to set goals and receive notifications, making it an interactive tool for developing healthy habits. It helps to make sure that the data flow between the ring and the app is consistent and reliable, supporting the overall user experience and making the Circular smart ring a powerful tool for personal health monitoring.

What did we like about the Circular smart ring?

Our evaluation of the Circular smart ring revealed several impressive features. The design of both the Circular Pro 1 and the Slim versions stands out for its elegant, minimalist aesthetic, combining functionality with style. The Slim version is especially notable for its ultra-thin and lightweight build, offering exceptional comfort.

The ring's health-tracking capabilities are another highlight. It includes sleep and activity tracking and monitors vital metrics like heart rate, SpO2, HRV, and temperature, providing valuable insights into physical well-being. This comprehensive health monitoring sets it apart in the wearable technology market.

Furthermore, the seamless integration with its app enhances user experience. The app's intuitive interface and the ring's precise data collection create an efficient and user-friendly health monitoring system, simplifying the usage and understanding of collected health data.

What we didn't like about the Circular smart ring?

The Circular Smart Ring, including both the Circular Pro 1 and Circular Slim models, has its shortcomings. A primary concern is the battery life, especially in the Circular Slim version, which may offer less longevity due to its smaller size. This could be a significant issue for users who value infrequent charging.

Additionally, while the ring tracks standard health metrics effectively, it lacks more advanced or specialized health parameters. Expanding its range of health metrics could make it more appealing to users with specific health monitoring needs.

Moreover, the design options are limited. While its minimalist style is unique, providing a greater variety of designs and customizable features could attract a wider audience, catering to different personal styles and preferences.

In essence, enhancing battery life, broadening health metric options, and diversifying design choices could significantly improve the Circular Smart Ring's appeal in the wearable technology market.

What do users say: Circular reviews uncovered

Circular ring reviews on Trustpilot and Reddit provide mixed feedback. Some users appreciate its polished design and health-tracking capabilities, finding it a valuable addition to their wellness routine.

However, concerns have been raised about the ring's build quality, with some users feeling the need to handle it delicately due to its plastic construction. This has led to mixed feelings about its durability and practicality in everyday use.

Overall, while the ring's features are generally well-received, its physical robustness and long-term usability are points of contention among users.

How much does Circular smart ring cost?

The products are available on the official Circular website and come in two versions— Circular Pro 1 and Circular Slim.

Circular Pro 1$394.99Silver, black fit, rose gold, goldOuter shell, chargerFrom US 6 to US 13
Circular Slim$286.47-Charger From US 6 to US 13

Circular Pro 1 is priced at $394.99 and comes with different finishes for the ring, including silver, black fit, rose gold, and gold.

Circular Slim, available at $286.47, comes with a single design option.

The official company website mentions a 14-day return period, secure checkout, and worldwide shipping. However, there is no specific information provided about any packages or discounts for either version of the ring.

Our Conclusion – is Circular Smart Ring worth a try?

The Circular smart ring and its respective Pro 1 and Slim versions excel in design and basic health tracking, offering a sleek, minimalist aesthetic and accurate monitoring of metrics like heart rate and temperature. The Slim version stands out for being exceptionally thin and light. However, it falls short in battery life, especially the Slim model, and lacks advanced health metrics.

In summary, the Circular Ring is a good choice for those valuing style and essential health tracking in a wearable device. But for those needing extensive health features, robust durability, and longer battery life, other options might be more suitable.


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prefix 4 months ago
Watch out for this ring company. I have been waiting for a replacement to a faulty Circular ring for 6 MONTHS with little sign of them actually ever replacing the faulty one which they told me to dispose of. I have tried reaching out numerous times only to be told it would be sent out shortly...what is there definition of shortly and how can they continue to ship new rings when they are not replacing faulty rings? On reading various review sites including Trustpilot, there seem to be an awful lot of people having issues with this company. My advice would be to look elsewhere for a fitness ring. It might also be helpful for reviewers to look into things like customer support as their overall review. These rings are not cheap, and customer service and accountability are important.