Apple Releases iOS 12.3, macOS 10.14.5, watchOS 5.2.1, and tvOS 12.3 and Debuts New Apple TV App

Apple has released its new Apple TV app with the iOS 12.3 and tvOS 12.3 updates, while macOS 10.14.5 updates AirPlay 2 and fixes bugs and watchOS 5.2.1 brings ECG and heart rate monitoring to additional countries.