Here's a screenshot from HTC One mini 2 running Android 4.4.2:
On a Samsung Galaxy Note II (GT-N7100) with same version of Android, all icons are blank:
The reduce test case does work when it's served from your website, but as soon as we serve it from the app's resources it does not work.
(To clarify, there's a HTTP server in the app itself and files get loaded through it in the webview. Since it all worked fine with FontAwesome fonts we don't see why these wouldn't work.)
the `?tptr4h` was the problem as the library expect it to have a value. Removing the query param altogether or doing `?tptr4h=0` fixed the issue and now the fonts load all right.
(library in question is https://github.com/palominolabs/url-builder)
Thanks for helping out!