Smartring Colmi R03 21.3MM 12 (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 it. In addition, the lightweight (4.7g) 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 21.3MM 12 (black) is suitable for users who want to discreetly and easily monitor their daily activity, sleep and heart rate without wearing a classic smartwatch. Due to its smaller dimensions and comfortable fit, the ring is not noticeable during everyday tasks or sports activities, but this means that it offers slightly less advanced functions than larger wearable devices. Before choosing, special attention should be paid to the appropriate size and check compatibility with your phone, as this is the only way to ensure accurate measurements and a good user experience. The model is especially useful for those looking for basic but reliable health monitoring and easy connection to the application.

Recommendation source: Enaa guides and team experience.

User view

The Colmi R03 smart ring is most often chosen by users who want a less inconspicuous technological device for monitoring physical activity, sleep and stress. In practice, it is especially useful for people who would like to wear an activity tracker every day, but do not like or find wristwatches uncomfortable. The discreet design ensures that it remains almost unnoticed in both business and sports environments.

Many users choose Colmi products because of the good experience with the applications and pleasant user support within the entire brand ecosystem.

Why buy at Enaa

When purchasing a smart ring on EnaA, you will find a clear product description and authentic, professionally prepared information to help you find the right model for your needs. In addition, smart rings in the Telephony category are selected and sorted according to current user preferences, making it easier to compare and choose.

Answers to frequently asked questions

How to choose the correct smart ring size?

Size is key for accurate measurements and comfort - it is recommended to accurately measure the circumference of your finger and check the size chart in the manufacturer's instructions. A ring that is too big or too tight can affect the accuracy of the data.

Can I use Smartring Colmi R03 with Android and iOS phones?

The ring is compatible with both Android and iOS phones, but before purchasing, check whether the supported operating system version is appropriate for your device model.

Is the Colmi R03 suitable for sports activities and swimming?

The model is designed for everyday use and basic activity tracking, including moderate sports activity. For use in water, be sure to check the water resistance level or restrictions on use in higher humidity conditions.

How long does the battery last under normal use?

Battery life will depend on frequency of use and the range of features enabled. More intensive use, constant synchronization with the app, and numerous notifications may shorten the time between charges.

Do I need an additional app to manage data from my smart ring?

Yes, for the full experience and insight into data, it is recommended to install the official Colmi app, which allows synchronization, activity monitoring, and basic ring settings.

Description updated: April 2026