smartwatchApple issues watchOS 5.1 for Apple Watch Series 4 without ECGmc October 30, 2018October 30, 2018Leave a Comment on Apple issues watchOS 5.1 for Apple Watch Series 4 without ECG Apple on Tuesday pushed out watchOS 5.1, bringing bug fixes, iOS 12.1 compatibility —but lacking an awaited ECG (electrocardiogram) app for Series 4 Apple Watches
