Guys, I was also facing the same problem (sluggishness of ionic apps on android). I think the issue is not with Ionic but its with Android’s webview which is not so up to the mark. Just for info, this issue is only for Android versions < 4.4 as from version 4.4 onwards Adnroid have chromium based webview. Try packaging your app with crosswalk, a chromium based run time / webview for hybrid apps.
I tried it and now I do not see any sluggishness in my app on android devices. I used Intel XDK to package my ionic app with crosswalk. Simply import your Ionic app’s www folder in XDK and used “Crosswalk for Android” option under “Build” tab of XDK. Try the generated APK on your android device, hopefully you should now have experience on Android.
Regards,
Gaurav