Smartring Colmi R03 20.3MM 11 (black)

Now you can access the most important information at your fingertips. The Colmi R03 smart ring provides convenient access to health and exercise reports from the QRing app. What's more, it is water resistant (5ATM), corrosion and abrasion resistant, so you can comfortably use it every day. The included case will allow you to safely store the ring and recharge its energy. In addition, the lightweight (4.7 g) design means comfort.

Monitor your health status

Colmi R03 will allow you to take care of your health. Smartring monitors sleep, its phases and quality, so you can eliminate bad habits. In addition, it measures your heart rate for the past 24 hours, which will allow you to understand the state of your body both at rest and during exercise. You can also measure your blood oxygen level and check all your health data in the dedicated QRing application.

Increase the effectiveness of your workouts

Exercise more effectively with Colmi R03. The smart ring accurately records data on the number of steps, calories burned and distance traveled. In addition, you can choose from 21 sports modes. What's more, the Smartring is 5ATM waterproof, which means you can use it during intense workouts and swimming without worrying about injuries.

Dedicated application

Download the QRing app, compatible with Android and iOS, and get the most out of your Colmi R03. From its level, you can monitor all parameters and physical activity. It generates daily, weekly and monthly reports of your measurements so you can react quickly to any abnormalities.

Long working hours

Use the Colmi R03 for days without worrying about draining it. The smart ring works for about 5-7 days and charging takes about 1 hour. The included case not only makes it easy to store, but also allows you to charge the device. Its powerful battery allows the ring to renew its energy up to 13 times on a single charge.

Included

• smart ring

• USB-C cable

• charging case

• user manual

Same summary

Smartring Colmi R03 20.3MM 11 (black) is designed for users who want to discreetly monitor their health and activities without the need for a larger wearable device on their wrist. It is best suited for those who want basic functions such as step counting, sleep monitoring and receiving notifications, but for whom a minimalist design is important. Choosing the right ring size has a significant impact on the comfort and reliability of measurements, so we recommend that you check the size before purchasing. For more advanced sports or health analyses and functions such as contactless payment, connectivity is not necessarily guaranteed, so the user should imagine basic, everyday use.

Recommendation source: Enaa guides and team experiences.

User view

A smart ring like the Colmi R03 is often used by those who don't like watches on their wrist but still want to track their daily activities or sleep quality. It's ideal for younger consumers and anyone who swears by minimalism or wants to wear their smart device during sports or at work, where it's less noticeable.

In practice, users appreciate being able to monitor data via the app and rely on the reliability of the Colmi brand, which is known for innovative, simple solutions in the field of wearable technology.

Why buy at Enaa

At Enaa, the selection of smart rings is always transparent and allows for quick comparison of features. Buying is easy, as you have quality products from renowned brands in the smart rings category available, with the team ensuring up-to-date information and support in making your choice.

Answers to frequently asked questions

Is the Smartring Colmi R03 compatible with my phone?

The Colmi R03 model typically supports connection to the latest Android and iOS devices, but we recommend checking the required operating system version in the manufacturer's instructions or data monitoring application.

How do I choose the correct ring size?

It is recommended that you accurately measure the circumference of your finger before purchasing and compare it to the size chart, as choosing a size that is too small or too large affects the comfort and accuracy of the measurements.

What happens if the ring doesn't fit properly?

An ill-fitting ring can reduce the accuracy of activity and heart rate data and cause discomfort when worn.

Is the ring waterproof for sports activities or showering?

The Colmi R03 is designed for everyday use and is resistant to drops, sweat, and occasional exposure to moisture, but is not intended for prolonged immersion or use in very humid conditions.

What app features are available for health monitoring?

The app typically allows you to record your step count, monitor your sleep, and provide basic notifications, but the details of additional options depend on the app version and your phone.

Description updated: April 2026