The Microsoft Edge web browser will expand from Windows to other operating systems – Apple’s iOS and Google’s Android. Since the end of Windows Mobile development, Edge didn't make sense even on a PC, because it lacked synchronization of bookmarks, favorites and passwords with the mobile phone. Microsoft is therefore extending user support to other mobile operating systems. Edge is purely a user interface thing, not an EdgeHTML and DirectX port.
Windows
Edge on Windows has a EdgeHTML rendering engine, which is dependent on DirectX for its hardware acceleration. User-Agent string has Edge at its end:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063Ios
It is not possible to upload applications that interpret JavaScript to the AppStore. Therefore, it is not possible to port any web browser to iOS. The same limitation applies to Universal Windows apps. Therefore, Edge, like Chrome, uses the WKWebView control. On iOS, Edge uses the WebKit port. Security updates for this browser are released by Apple as part of iOS updates. User-Agent string at the end of EdgiOS:
Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Mobile/14F89 Safari/603.2.4 EdgiOS/41.1.35.1Android
Google is more open, and the Aplay Store does not have such limitations, so it is possible for the application to include its own web browser core. Microsoft Edge for Android uses its own fork of Blink (which is a fork of WebKit) from the Chromium project. User-Agent string has EdgA at the end:
Mozilla/5.0 (Linux; Android 8.0; Pixel XL Build/OPP3.170518.006) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.0 Mobile Safari/537.36 EdgA/41.1.35.1