Simple user settings Fuse, using NSUserDefaults in iOS, and SharedPreferences for Android.
Using fusepm
$ fusepm install https://github.com/bolav/fuse-usersettings
In UX:
<UserSettings ux:Global="UserSettings" />
In JavaScript:
var settings = require('UserSettings');
settings.setString('key', 'value');
var val = settings.getString('key', 'default return');