Here are some useful iPhone apps for freshman:
The Elements “It features beautiful high-resolution content optimized for the iPhone 4 screen. If you think you’ve seen the periodic table, think again. The Elements for iPhone lets you experience the beauty and fascination of the building blocks of our universe in a way you’ve never seen before…” Read more here.
“Graphing Calculator turns your phone or iPod into an intuitive high-resolution function plotter and scientific calculator. Features include: quickly plot and trace multiple equations on the same graph, custom keyboard to speed up entering in equations, pinch to zoom and drag/slide for scrolling the graph in real time, and the graph view supports portrait and landscape modes…” Read more here.
Math Pro “It tackles algebra, geometry, probability, statistics, trigonometry and calculus. There are two killer features that really stand out. One is the large number of explanations and charts that can serve as a great tool when working math problems. Much of the higher levels of math involve understanding different geometric shapes or how to calculate formulas. Math Pro has very easy-to-maneuver sections describing just about most of what you would need to find…” Read more here.