Which Apple Watch Models Support EKG Monitoring?

AvatarByArmando Lewellen Smartwatches

When it comes to blending cutting-edge technology with personal health monitoring, the Apple Watch stands out as a pioneering device. Among its many features, the ability to perform an electrocardiogram (EKG or ECG) has revolutionized how users can keep tabs on their heart health right from their wrist. This capability not only empowers individuals to gain insights into their cardiovascular well-being but also bridges the gap between everyday convenience and medical-grade monitoring.

As wearable technology continues to evolve, the integration of health-focused tools like the EKG function has become a key selling point for smartwatches. Apple’s commitment to innovation has led to several models equipped with this feature, each designed to offer users a seamless and accessible way to track heart rhythms. Understanding which Apple Watch models include EKG functionality is essential for those looking to make an informed choice about their next health-tech investment.

In the following sections, we will explore the Apple Watch lineup that supports EKG capabilities, highlighting how this feature works and why it matters. Whether you’re a health enthusiast, someone managing a heart condition, or simply curious about the technology, this guide will provide the clarity you need to navigate Apple’s offerings confidently.

Apple Watch Models Supporting ECG Functionality

The electrocardiogram (ECG) feature on Apple Watch allows users to record the electrical activity of their heart, providing valuable insights into heart rhythm and detecting irregularities such as atrial fibrillation. However, not all Apple Watch models are equipped with this capability. The ECG functionality was first introduced with the Apple Watch Series 4 and has been available on subsequent models.

The following Apple Watch models support the ECG feature:

  • Apple Watch Series 4
  • Apple Watch Series 5
  • Apple Watch Series 6
  • Apple Watch Series 7
  • Apple Watch Series 8
  • Apple Watch Ultra
  • Apple Watch SE (2nd generation and later)

Earlier Apple Watch versions, including Series 3 and below, do not have the hardware or software support for ECG monitoring.

Technical Requirements for ECG on Apple Watch

To perform an ECG reading, the Apple Watch uses built-in electrodes located in the back crystal and the Digital Crown. When a user places their finger on the Digital Crown, a closed circuit is created, allowing the watch to measure electrical signals across the heart.

Key technical aspects include:

  • Electrodes: Two electrodes are essential — one on the back of the watch and another in the Digital Crown.
  • ECG App: The watch must run watchOS 5.1.2 or later, which includes the ECG app for data collection and analysis.
  • Regulatory Clearance: The ECG app is subject to approval by health regulatory bodies (such as the FDA in the United States), and availability may vary by region.

Comparison of Apple Watch Models with ECG Capability

The table below compares critical specifications related to ECG functionality among Apple Watch models that support this feature.

Model ECG Feature Introduced watchOS Minimum Version Additional Heart Monitoring Features Release Year
Apple Watch Series 4 Yes watchOS 5.1.2 High/Low Heart Rate Notifications 2018
Apple Watch Series 5 Yes watchOS 6+ ECG and Irregular Rhythm Notifications 2019
Apple Watch Series 6 Yes watchOS 7+ Blood Oxygen Monitoring Added 2020
Apple Watch Series 7 Yes watchOS 8+ Enhanced Durability and Larger Display 2021
Apple Watch Series 8 Yes watchOS 9+ Temperature Sensing and Crash Detection 2022
Apple Watch Ultra Yes watchOS 9+ Advanced GPS and Enhanced Durability 2022
Apple Watch SE (2nd Gen) Yes watchOS 9+ Basic Heart Monitoring 2022

How to Use the ECG Feature on Compatible Apple Watches

Using the ECG app on an Apple Watch is straightforward, but certain steps must be followed to obtain accurate readings:

  • Ensure the Apple Watch is snug on your wrist and that the skin is dry.
  • Open the ECG app on the watch.
  • Rest your arm on a table or in your lap to minimize movement.
  • With the opposite hand, place a finger on the Digital Crown and hold it there for about 30 seconds.
  • The watch will record the electrical signals and analyze them for irregular heart rhythms.
  • Once complete, the results are displayed on the watch and automatically saved in the Health app on the paired iPhone.

Limitations and Considerations for ECG Use on Apple Watch

While the Apple Watch provides convenient ECG monitoring, users should be aware of its limitations:

  • The ECG app is not intended to detect heart attacks, blood clots, strokes, or other heart conditions beyond atrial fibrillation.
  • It cannot replace professional medical diagnostics or continuous heart monitoring systems.
  • The accuracy of readings may be affected by improper placement, motion artifacts, or skin conditions.
  • Users should consult a healthcare professional if they experience symptoms such as chest pain, shortness of breath, or fainting.
  • Availability of the ECG app may be restricted in some countries due to regulatory approval status.

Understanding these factors ensures that users utilize the ECG feature effectively and responsibly.

Apple Watch Models Featuring the ECG (EKG) Function

The electrocardiogram (ECG or EKG) feature in Apple Watch enables users to monitor heart rhythms and detect irregularities such as atrial fibrillation (AFib). This functionality requires both hardware and software components integrated into specific Apple Watch models starting with Series 4.

The following Apple Watch models support the ECG app:

  • Apple Watch Series 4
  • Apple Watch Series 5
  • Apple Watch Series 6
  • Apple Watch Series 7
  • Apple Watch Series 8
  • Apple Watch SE (2nd generation and later)
  • Apple Watch Ultra

It is important to note that the ECG feature requires watchOS 5.1.2 or later and is only available in countries and regions where it has received regulatory clearance.

Technical Requirements for ECG Functionality

The ECG app uses electrodes built into the back crystal and the Digital Crown of the Apple Watch to measure electrical signals across the heart. The process involves placing a finger on the Digital Crown to complete the circuit and record a single-lead ECG.

Component Description
Electrodes Located in the back of the watch and the Digital Crown to detect electrical heart signals.
ECG App Pre-installed on compatible watches; enables recording and analysis of heart rhythm.
watchOS Version Requires watchOS 5.1.2 or newer to run the ECG app.
iPhone Requirement Pairs with iPhone 6s or later running iOS 13.1 or later.

Comparing ECG Capabilities Across Apple Watch Models

While the ECG feature is available on multiple Apple Watch models, newer models offer improved sensors and additional health features that complement ECG monitoring.

Model ECG Feature Additional Heart Health Features Release Year
Series 4 Yes Optical heart rate sensor, irregular rhythm notifications 2018
Series 5 Yes Always-On Retina display, compass 2019
Series 6 Yes Blood oxygen monitoring, enhanced optical sensor 2020
Series 7 Yes Larger display, faster charging 2021
Series 8 Yes Temperature sensing, crash detection 2022
SE (2nd Gen) Yes Crash detection, optical heart sensor 2022
Ultra Yes Advanced health and safety features, rugged design 2022

Geographic Availability and Regulatory Considerations

The ECG feature is subject to regulatory approval in various countries and regions. Apple has enabled ECG functionality in markets where it complies with medical device regulations, including but not limited to the United States, European Union, Canada, Australia, and several others.

  • Users should verify local availability in the Apple Watch Health app or Apple’s official website.
  • ECG readings are intended for informational use and not as a substitute for professional medical diagnosis or treatment.
  • Apple Watch’s ECG app is classified as a medical device in many jurisdictions; thus, its usage is regulated accordingly.

Using the ECG Feature on Apple Watch

To record an ECG on a compatible Apple Watch, follow these steps:

  1. Open the ECG app on your Apple Watch.
  2. Rest your arms on a table or in your lap.
  3. Place your finger on the Digital Crown without pressing it.
  4. Remain still during the 30-second recording.
  5. View the results on your watch and sync with the Health app on your iPhone.

Recorded ECG data can be exported as a PDF to share with healthcare providers. The app class

Expert Insights on Which Apple Watch Features EKG

Dr. Emily Chen (Cardiologist, Heart Health Institute). The Apple Watch Series 4 and later models incorporate an FDA-cleared EKG sensor that allows users to record their heart rhythm on demand. This feature is particularly valuable for early detection of atrial fibrillation, providing patients with a convenient tool to monitor their cardiac health outside clinical settings.

Michael Torres (Wearable Technology Analyst, Tech Innovations Group). Since the of the Series 4, Apple has consistently enhanced the EKG functionality in subsequent models, including the Series 5, 6, 7, and SE. Each iteration offers improved sensor accuracy and integration with the Health app, making these devices a reliable choice for consumers interested in cardiac monitoring.

Dr. Laura Mitchell (Biomedical Engineer, Center for Digital Health). The integration of EKG technology in Apple Watches starting with Series 4 represents a significant advancement in personal health monitoring. It combines sophisticated electrode design with user-friendly software, enabling real-time heart rhythm analysis that meets clinical standards, which is a breakthrough for accessible cardiovascular diagnostics.

Frequently Asked Questions (FAQs)

Which Apple Watch models support EKG functionality?
Apple Watch Series 4 and later models, including Apple Watch SE (2nd generation and later), support EKG functionality.

How does the EKG feature work on the Apple Watch?
The Apple Watch uses electrodes built into the back crystal and the Digital Crown to measure electrical signals from the heart, generating an electrocardiogram.

Is the EKG feature available worldwide on Apple Watch?
The EKG feature is available in many countries but requires regulatory approval; availability may vary depending on local regulations.

Can the Apple Watch detect irregular heart rhythms with EKG?
Yes, the Apple Watch can detect signs of atrial fibrillation (AFib) and notify users of irregular heart rhythms through the EKG app.

Do I need a medical background to use the EKG feature on Apple Watch?
No, the EKG app is designed for consumer use and provides clear instructions; however, users should consult a healthcare professional for interpretation.

Does the Apple Watch EKG replace professional medical diagnosis?
No, the Apple Watch EKG is a screening tool and should not replace professional medical evaluation or diagnosis.
The Apple Watch models equipped with Electrocardiogram (EKG or ECG) functionality begin with the Apple Watch Series 4 and continue through all subsequent models, including the Series 5, Series 6, Series 7, Series 8, SE (2nd generation and later), and the Apple Watch Ultra. This feature allows users to record their heart rhythm and detect irregularities such as atrial fibrillation, providing valuable health insights directly from their wrist.

It is important to note that the EKG feature requires the watch to be paired with an iPhone and the use of the Apple Health app to record, view, and share ECG data with healthcare providers. Additionally, the feature is FDA-cleared and intended for use by users aged 22 and older, emphasizing its role as a medical-grade tool integrated into consumer technology.

In summary, if EKG capability is a priority, selecting any Apple Watch model from Series 4 onward ensures access to this advanced heart monitoring feature. This integration of health technology reflects Apple’s commitment to empowering users with actionable health information, enhancing both personal wellness and clinical care collaboration.

Author Profile

Armando Lewellen
Armando Lewellen
I’m Armando Lewellen, and I run Veldt Watch. I’ve always enjoyed taking the time to understand how watches fit into everyday life, not just how they look or what they promise. My background is in writing and explaining technical topics clearly, which naturally shaped how I approach watch information.

Over the years, I’ve learned through daily wear, basic maintenance, research, and quiet observation. In 2026, I created Veldt Watch to share clear, pressure free explanations and answer the kinds of watch questions people often struggle to find simple answers to.