App not working properly in jelly bean and kitkat

[iignatov]

If you need to support Android version older than 4.4 then you can use Crosswalk:

Anyone with a working Android 4.3 app for Ionic2

IonicV2 supports android 4.4 and up. The older browser on pre-4.4 devices do not have the features needed for ionic2 and angular 2 to work. Though this can be fixed with crosswalk.