iStudiez Pro: $2.99
Keep your schedule and class locations at a glance, keep track of lecture and lab locations, and track tasks and deadlines, homework assignments, etc.
AlgebraPrep Series: $2.99 Each
Need to get your algebra knowledge in shape? These apps — a series of five, for $2.99 each — include practice, videos, and tests for algebra factoring, graphing, systems, equations, and real numbers.
Convert - The Unit Calculator: $0.99
Converts dozens of unit types, ranging from measurements you'd use in math class — angles and area; to science class — temperature and force; to design class — typography and computer file sizes. Currently the no. 2 most downloaded paid app in the App Store.
There's plenty of paid dictionary apps in the App Store — Apple is currently promoting a $25 dictionary, for example. But this one is free and includes audio, etymology, and a thesaurus. Caveat: It's a big file because it's designed to work offline, too. So it's a good idea to install it over a wifi signal — or USB sync.
A simple assignment notebook, which is currently the no. 2 most popular free education app in the App Store. Track assignments, quizzes, tests, etc.
The Chemical Touch Lite: Free
"Sometimes all you need is a simply periodic table," the app maker says. True! Includes elements' masses, densities, melting and boiling points, etc. Also a pro version for $0.99.
The iPhone comes with a built-in note taking app, but it's an ugly yellow design, and requires you to plug in your phone to sync it with your computer. Simplenote syncs wirelessly to a Web interface, so you can take notes in class and pull them up on your laptop, even if you left your iPhone cable at home.
Amazon Kindle App: Free
For mainstream novels and reference books, Amazon's Kindle e-book platform is the industry leader. This app lets you read and bookmark any e-book that Amazon sells for the Kindle. If you also have a Kindle or Kindle DX, you can keep your latest page synchronized across all devices.
Free Language Tutors: Free
This app maker, 24/7 Tutor, offers several free tutoring apps, including Spanish, French, Italian and German. They include audio of words, a puzzle game, flash cards, and quizzes.
This game is not educational, and is very addictive. But we snuck it in here because it blissfully wasted hundreds of hours during our freshman year of college, and might as well do the same for you!