ECG is a newly released application for Apple Watch Series 4. It is available through the gadget's watchOS update. Its primary function is to monitor your heartbeat and make alerts if something about your cardio rhythm seems suspicious.

Apple's Healthy Trends

ECG app for Apple Watch 4 screenshot

New watchOS updates will encourage you to be more active physically. And with the active lifestyle naturally comes a faster heartbeat. ECG App is meant to keep an eye on what is going on with your ticker. Hence its name — ECG stands for electrocardiography.

Basically, the app is a mobile substitute for ECG/EKG. Which are, by the way, the same thing despite they are two different abbreviations. It is programmed to detect any flaws that occur in your pulse patterns. However, it cannot fully replace an actual health exam by any means. So if you're experiencing problems with your cardiovascular system, contact your physician asap.

How to Use ECG App

Before you can put the ECG app to test, you need to enter your birth date. Then the algorithm is simple and looks like this:

1) Tap the app's icon — it looks like a heart rate reading.
2) Assume a comfortable sitting position — you should be as motionless as possible for the next half a minute.
3) Put your hands on your lap/table/dresser, etc.
4) Put one finger on the crown of Apple Watch.
5) Wait until measuring is over. It takes 30 seconds.

Remember: you should sit as still as you only can. Even the slightest movement can affect the measurement precision negatively, and the cardiogram will be flawed. The watch itself must be attached to your wrist firmly.
As soon as the countdown is over, you'll be provided with the ECG results:

1) Sinus rhythm. That means your heartbeat is normal and no obvious anomalies have been detected.
2) Atrial fibrillation (AFib). Something about your cardio rhythm is abnormal, and seeing a doctor is the best and only solution.
3) Inconclusive. Basically, that means try again: either app or watch failed to read your heart rate.

Speaking of accuracy, ECG can actually do a great job at detecting certain trends in your heart activity. But only if you do it on a regular basis starting with at least one week. Conducting the cardiogram is possible, thanks to electrodes placed on the crown and back of the Apple Watch. Then, based on the heartbeat signals registered, processor S4, and the app do some calculations to provide a cardiogram classification.

What ECG App Can't Do

As we've mentioned, Apple ECG app is no substitute for a real health exam. As an additional bonus, you can export the app's data in a PDF file to show it to your doctor — statistics on your heart activity will be stored in the Health app.

Also, the Health app will provide a few recommendations on what you should do if your cardiogram seems a bit off.
But that's about it. Don't expect it to give you an exhaustive diagnosis or track the possible reasons for your ailment down. No matter how advanced today's med-tech is, with its 3D-printed donor organs and tactile sensation prosthesis, a simple app is a gazillion miles away from replacing an actual cardiologist.

But if you're patient enough to measure the heartbeat persistently over the course of one month — the app is right for you. In some cases, it may help your doctor to get a better picture of your heart's condition.

What ECG Requires From Your System

In order to test ECG app personally, you should upgrade your watchOS to at least version 5.1.2.  iPhone iOS must be 12.1.1. Don't forget that Apple Watch Series 4 must be charging during the update process, since it requires 50% battery life to be finished. Stay healthy and let your heart problems be love-related only.