COLMI R02 Smart Ring (Rose Gold, Size 7) – Heart Rate, SpO2, Sleep & Activity Tracking

What people love (and don’t love)

What people love

Lightweight and comfortable to wear all day and night without feeling bulky.
Accurate basic health tracking including heart rate, blood oxygen, sleep, and steps.
Attractive rose gold design that looks like regular jewelry.
Easy-to-use app with no subscription fees required.
Battery lasts several days (3-4 days) with quick, painless charging.
Good value for the price compared to smartwatches.

What people don’t love

Sleep tracking can be unreliable or miss long naps.
App can have usability issues; activation problems reported.
Metal allergy issues for sensitive users.
Sizing problems reported by some users.
Delivery and refund process can be slow.

Stylish and affordable smart ring with solid health tracking, but some accuracy and sizing issues may affect user experience.

Summary based on customer review evidence.

Check price on Amazon

Quick facts

Brand: COLMI
Price: USD 55.98
Rating: 4.30 (133 reviews)

The COLMI R02 Smart Ring is a simple, subscription-free way to keep an eye on daily wellness and activity metrics without wearing a full smartwatch. Designed for both women and men, it tracks essentials like heart rate, blood oxygen, sleep, and everyday movement (steps, distance, and calories).

You can view the current price and full details on Amazon here.

This version comes in Rose Gold and size 7, and includes a compact charging case so you can top up power on the go. It also adds a handy remote photo control feature to help with selfies and group shots.

Sizing tip: COLMI recommends purchasing a sizing kit or using the size chart before ordering to help ensure a comfortable fit and reduce the chance of returns or exchanges.