As the title indicates, StudyBlue is an educational app that gives you information on virtually any subject. It comes with a function that allows you to make paperless flashcards and then study with them. Everything gets saved onto your personal account, and is also accessible on the computer. A study guide keeps track of how many cards you have for a class, and how many you have studied. It also tells you your percentage of accuracy with the cards.
If you work better by physically holding the cards, you can pay to have them print a study guide. In my opinion, this is best if you have messy handwriting and plan on sharing them, but since it's $8.99 to buy the study guide.
The digital backpack let's you save everything from flashcards to practice tests and self assessments, and sort them by subject. The app also let's you collaborate with partners and classmates, and gives you access to textbook pages.
StudyBlue has raked in positive reviews from college students, and many have reported an improved overall average. This is the perfect app if you are like most of the population and have a hard time learning material the first time through.