Timetable (HD 2) for iPhone - First draft

Currently working on the iPhone version of Timetable HD 2 (http://itunes.apple.com/de/app/timetable-hd-2/id438103716?mt=8).

Those icons down there are just placeholders. I'll try to make them ... well ... different, so that they'll (hopefully) fit better to their actual function.

Any tips? :)