2. WolframAlpha
WolframAlpha is a revolutionary (and totally cool!) app that “uses its vast collection of algorithms and data to compute answers and generate reports for you.” The user is able to research everything from socioeconomic data to complex math problems. Have a question on your trigonometry homework? Simply type in the question into the search bar and WolframAlpha will quickly pull through its sources to compute the answers. Procrastinating? WolframAlpha will help you look up random trivia and even calculate calories. This was a tester favorite! ($2.99 Android, iOS)