Package as mobile app, icons not visible

[jev-uv]

I've created a book as a revision aid and would like to distribute it as a mobile app. I choose to use PhoneGap and (PhoneGap Build) for this - however when I test the application using ( https://play.google.com/store/apps/details?id=com.adobe.phonegap.app ) all is good. But install the .apk on my phone and the navigation icons at the top aren't visible (but they work).

I guess I'm trying to find out if there is a better way to package this content as a mobile application?

Cheers

[SamyPesse]

Ok, it seems there is a problem with font-awesome, if there a way you can debug the application to see the network/js errors?