What’s SkyLabs CART-I Ring?

The Sky Labs CART-I ring is a cardio tracker that helps you keep track of atrial fibrillation (also called AFib or AF), a condition where the heart beats in an irregular way. Designed and manufactured in South Korea, CART-I is the world’s first-ever ring-type smart wearable heart rhythm monitoring medical device on the market.

How Does CART-I Work?

CART-I provides photoplethysmography (PPG) signals to measure heart rate and spot atrial fibrillation or its burden. It also uses electrocardiogram signals to provide additional information to the user’s doctor.

CART-I tracks these measurements simply by touching the ring at any time. Note that its built-in optical sensor can continuously measure cardiac signals by wearing it without user intervention.

The ring has been authorized for use by the South Korean Ministry of Food and Drug Safety and certified by the European Union. Based on clinical studies, CART-I can detect atrial fibrillation with 99% accuracy.

CART-I Mobile App

CART-I owners can download the free CART-I app for Android and iOS devices, which they can use to check their heart rhythm in real-time. The app will store, track, and analyze the user’s data within the desired period, making the ring fairly effective for early diagnosis based on long-term data. Through the mobile app, users can also find a list of doctors they can contact for proper consultation.

In the future, Sky Labs is looking into expanding CART-I’s coverage to other diseases such as chronic obstructive pulmonary disease (COPD), high blood pressure, heart failure, respiratory diseases, and even Covid-19. Also in the pipeline are features to analyze arrhythmia, sleep quality, and stress levels.

CART-I is made of surgical steel and weighs around 4 grams. It has an IP58 rating, which means it’s dustproof and waterproof. It can last up to 48 hours per charge.

product functionalities
Product categories
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Sleep Tracking and Improvement
Yes (soon)
Stress Level Monitoring and Management
Yes (soon)
Heart Rate Measurement and Monitoring
Blood Oxygen Sensor
Sleep Apnea Screening
Yes (soon)
Step Counter for Activity Tracking
Public Travel Pass
Contactless Payment
Access Card/Badge
Voice Assistant Controller
tech specs
Bluetooth for Wireless Connection
Gyroscope Sensor
NFC - Near Field Communication
Water Resistance
Battery Life/Passive device with no battery
48 hours
Smartphone and Computer Operating System (OS) Support
Android, iOS
product availability
Is the product available for purchases?
Yes ($336 / €276)