With changeable themes, you can “skin” the app to meet your aesthetic requirements (white on blue to look like a blueprint, or “high powered” – shiny black with white markings and the reverse for numerals) or for better selection of keys (functions in blue, “clear” keys in red, numerals in white, operators in yellow, and a large, green “=” key). I’m going to specifically cover the iPhone versions here, but encourage you to look at the Mac version if you’re of the numerical bent. Available for the Mac and for iPhone (in two flavors – more on that later), it’s an amazing amalgam of tool, reference list, and study in great interface design. Well, James Thomson, a former Apple employee and the developer of DragThing, has created just the thing for you: pCalc. And what if you needed more or fewer decimal places, or a better font or color for reading in your environment? Would you just carry along your trusty HP or TI scientific programmable, or would you keep a list of these bits of information and write it down from your notes, then tap it in when needed? For many of those in the scientific community, this is a constant necessity (no pun intended). Or if you need to plug in large numbers regularly, such as the Newtonian Constant of Gravitation (6.6742e-11, if you’re interested), or the speed of light in a vacuum (299792458 metres per second), or pi, or the Golden Ratio (phi), or the Faraday constant. But what if you’re involved in alternate number systems (binary, hexadecimal, or octal, for instance)? It would help if your calculator did some of the work for you. That should do it, right? Yes, the built-in calculator is pretty powerful. What more could you want? Well, if you’re the scientific kind, you’d want to turn it to landscape and get all those trigonometric function keys, log functions, square, cube, square roots, percentage, and a few other keys. Why would you want to add a calculator to your iPhone/iPod touch? You can’t remove the standard one, and it does most of what normal people use a calculator for all ready: add, subtract, multiply, divide, hold a number in memory and let you use it in an operation. If you buy something through the links on this page, we may earn a commission at no cost to you.
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