Originally called The Spark when it debuted in 1999, SparkNotes is now available as an app for your mobile device.  While SparkNotes shouldn’t be used instead of a text, it can be very helpful when trying to understand everything that is going on.

The free app comes with 50 study guides, a check-in feature to help facilitate study groups as well as a function to share what you’re currently studying on Facebook.

Read the story by Cameron Summerson or get the SparkNotes app.