Studious is a free Android app for keeping track of important assignment due dates. You can set alarms to remind yourself of impending due dates. The app also gives you the option to take notes and pictures to save on your Android phone or Android tablet. And a nifty feature of Studious is that you can set it to automatically silence your phone at the start of a class.
Studious is not the fanciest reminder app that I’ve seen, but it will definitely get the job done. The option to automatically silence your device at the start of class helps students and instructors alike.