Описание тега ionic-native
The tag specific for ionic-native, a replacement for using ngCordova and supports ionic 1, 2, 3 and 4, and since ngCordova tag is existing this tag must exist as well, the ngCordova is such a different tag and not related to ionic-native, so it is helpful to avoid any conflict between these two tags.
Ionic Native is a curated set of ES5/ES6/TypeScript wrappers for Cordova/PhoneGap plugins that make adding any native functionality you need to your Ionic, Cordova, or Web View mobile app easy.
Ionic Native wraps plugin callbacks in a Promise or an Observable, providing a common interface for all plugins and ensuring that native events trigger change detection in Angular 2.
For Ionic v1 (AngularJS, Angular 1.x) support, please use version 2 of Ionic Native. See the 2.x README for usage information.