I've downloaded the Mobile Moodle app for iOS and it works fine with the demo site.
I've enabled web services in "Advanced Settings" admin panel and also, I've enabled the Web Services for mobile in "Plugins > Web services > Mobile".
I've been testing users with manual authentication (a teacher and a student), just to try, but the app doesn't show any message. It just does not pass the login screen. (In the Android version it is the same)
The url access is https (https://moodle2013-14.ua.es/moodle/), and I was wondering if it is a problem or I'm missing some extra configuration.
Any help is welcome.