0 - Ionic Framework in a nutshell
Ionic is an open-source framework created in 2013 by Max Lynch, Ben Sperry, and Adam Bradley. Two different versions are available, incompatible with each other: the first version, 1.3 is based on AngularJS 1.5 while version 3.5 is based on Angular 4 and TypeScript.
1 - What is Ionic Framework?
Ionic Framework is a mix of tools and technologies to develop hybrid mobile applications quickly and easily. It relies on AngularJS for the web application part of the framework and on Cordova for the construction part of the native applications. This open source framework makes it possible to develop a deployable application on several environments such as a website or a mobile application for systems such as Android or iOS or Windows Phone ...
2 - Ionic 1.x
3 - Ionic 2.x
The performance of Ionic 2 is significantly improved. The applications are much more fluid than those compiled by Ionic.