Both these apps provide portable ways of keeping track of your class schedule, but they have other features that make them more useful than a simple calendar. They both keep track of assignments and due dates, and also record your teachers' email addresses and office hours.
iPlanner lets you send an email right from within the app and also links to your classes' websites. Class Buddy can export and import events to Google Docs. Either one will help a student answer the all-important questions: "Where am I supposed to be, when am I supposed to be there, and what homework am I supposed to have done?"
Nihar Gandhi's iPlanner for iOS | $1.99
mSurf Lab's Class Buddy Pro for Android | $1.99
Jake Widman is a freelance writer in San Francisco and a regular contributor to Computerworld. Liam Widman is a student at the University of California, Santa Cruz and a former contributor to Mac|Life.