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
Sleep Tracking and Improvement
Yes (soon)
Meditation Aid
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
Smart Key (home, buildings, cars)
Log in Device for Smatphones, Laptops, Online Accounts, etc.
Passwordless Login (e.g. FIDO2 WebAuthn)
Two Factor Authentication (2FA) Support
Motion Controlled Pointer or Mouse
Motion Control for Music Player Apps
Motion Control for MIDI devices/software
UV Radiation Tracking
Personal Safety - Panic button
Smartphone App Notifications (Social Media, Calls, Messages)
Phone Extension - speed dial, phone calls
Voice Assistant Controller
Portable Data Storage and Sharing
tech specs
Bluetooth for Wireless Connection
Gyroscope Sensor
NFC - Near Field Communication
RFID - Radio Frequency ID
Accelerometer Sensor
Heartrate Sensor
Blood Oxygen Sensor
Proximity Sensor
Body Temperature Sensor
Electrodermal (Skin) Conductivity Sensor
Light Indicator
Action Button
Haptic/Vibration Indicator
Ultra Violet (UV) Radiation Sensor
Fingerprint Scanner
Memory chip
Water Resistance
Battery Life/Passive device with no battery
48 hours
Charging Method
Quick charging
Smartphone and Computer Operating System (OS) Support
Android, iOS
product availability
Is the product available for purchases?
Yes ($336 / €276)