Using Moodle on iPhone and other mobile devices
Moodle works well using the regular browser on most mobile devices without any app.
Moodle HQ have developed a Moodle Mobile app which is available through iTunes for IOS and the Google play store for Android. While this app has some good features be aware UNE uses a customised version of Moodle with additional tools. Not all content will be available and some may appear differently in the app.
If you do use an app, Cloud based services such as Dropbox and Google Drive may be beneficial.