Tutor-DE helps you study German using your cell phone's screen.  No air-time connections are necessary since everything needed is stored as an application 'MIDlet' on your phone.  Most phones manufactured in the last few years can be used, regardless of screen size.

After starting the program, select a category from the pull-down menu, then use your 'Right' and 'Left' keys to go through the lessons.  Messages are shown in English [US-variant], and on-screen German translations are shown for each of over 450 popular words and simple phrases.  These are organized into eleven categories: General, Places, Foods, Objects, Transport, Directions, Calendar, People, Numbers, Colors, and Languages.