Apps to try
Dictionary.com
Access to essential and most comprehensive dictionary app for dependable definitions at your fingertips.
Notability
Combine handwriting, photos and typing in a single note to bring your projects to life. Note: This app is only for iOS and requires a one-time purchase of $9.99.
SimpleMind Lite
Mind mapping helps you organize your thoughts, remember things and generate new ideas. This app can help you mind map concepts covered in your classes and in your reading, to better understand the complex material covered.