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Calculator + is a free calculator app that's available in the iTunes app store. The creators, xNet.com, call Calculator +, “the iPhone calculator replacement.” Its simple design supports handwriting and many scientific functions for your convenience. You can easily edit input with this app, as it allows you to go back and change specific input, and it displays both the equation and the result on the screen of your iPhone. Click here to download Calculator + in iTunes free!
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You want to make sure that you're tipping your waiter the right amount when dining alone or when sharing the bill and that's where CheckPlease comes in handy. CheckPlease LITE is a free app, available in the iTunes app store. CheckPlease includes the same features that the paid version includes (with ads) such as: quick and accurate calculation of tips, the option to tip with or without tax, the ability to include coupon discounts, the option to round-up, and more! This app is well worth the download on your iPhone. Click here to download CheckPlease in iTunes free!
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Free Graphing Calculator
The Free Graphing Calculator download is free from the iTunes app store and does a lot more than most calculator apps that you can purchase in the app store. Not only can you do the usual arithmetic and exponential functions, but you can also graph up to four equations at once, label the graphs, and zoom in and out of the graphs. This app also offers a unit converter and other scientific calculations, such as the speed of light and strength of gravity at Earth's surface. Click here to download the Free Graphing Calculator in iTunes!
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Graphicus – Graphing Calculator
The Graphicus - Graphing Calculator comes with an easy multi-touch interface which handles plotting, roots, and more! You can use an unlimited amount of functions, all at the same time. With this easy to use app, you can also draw graphs, tangents, and oscillating circles. Graphicus is available for $1.99 in the iTunes app store. Click here to download Graphicus - Graphing Calculator in iTunes for $1.99!
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PI83 Graphing Calculator
The PI83 Graphing Calculator is a must have for math class. It does all that the traditional TI83 graphing calculator does, and it can be downloaded to your iPhone from the iTunes app store for a fraction of the cost of the TI83 graphing calculator. The PI83 app allows you to timestamp screenshots so you can use it during tests, all the while not having to carry around the big and bulky TI83 in your bag. This graphing calculator is a must have for class and is available for $0.99. Click here to download PI83 Graphing Calculator!