Available In: App Store

Price: $1.99

As a math and science teacher, I do a fair share of tutoring to make some additional income. I often carry my trusty TI-83 Plus (special edition blue, baby!) with me, but there have been several times when all I had was my iPhone. I will admit that the included iPhone calculator makes for a pretty decent substitute, and I get my scientific calculator functions when I rotate to landscape mode. However, there remained some functionality that was to be desired, and having a one-line display seems to remind me of the difference between a TI-30 and its bigger cousin, TI-83.

When sitting side to side with my TI-83 Plus, Numerus clearly has fewer buttons and no graphing capabilities. However, the app does pack in a decent number of buttons and their corresponding math functions. Numerus offers a multi-line display so you can see previous calculations right above your current calculation. All of the regular calculator functions along with those normally found on a standard scientific calculator are displayed on the iPhone screen in portrait mode. Different modes (degrees, radians, grad), along with a catalog of math functions exist. A “2nd” button allows you to choose other functions that don’t have a dedicated button, similar to what you would see on any commercial scientific calculator. [Read more…]