SnapNotes

Before you can actually take snaps and organize them, the app requires you to create a class schedule so that the subject would be auto-detected when you’re in class. You can take snaps of the board, slides or notes, so that you can stay focused in class and not get distracted.
 
Snaps are automatically organized inside the app and you can create pdf files to check them on the computer later. The app lets you adjust camera resolution and crop snaps in any way you wish. You can archive subjects and use zoom features inside the app. It also lets you share snaps with friends and adjust image color and brightness, to make it easier to read.