"In Calc Zero, I make extensive use of NSNumberFormatters to circumvent floating point math errors. I also find that I frequently want to vary the number of digits that are displayed by the calculator, so I allow the user to quickly adjust the display precision by swiping horizontally in the number display area at the top of the screen. Under the hood, NSDecimalNumbers actually implements base-10 math and can represent any number that can be expressed as mantissa x 10^exponent where mantissa is a decimal integer up to 38 digits long, and exponent is an integer from –128 through 127. The developer described his implementation as follows: "Calc Zero uses NSDecimalNumbers to represent all numeric values. Simply sliding to the right is sufficient to highlight the desired function and select it. The trick here is that one doesn't have to slide the finger up and over. The effect is shown below, which also happens to show the new keyboard look in version 1.4, due out soon. The conversion is done and shows that one hour is 0.000114 year, approximately.Īnother thing I like is that pressing and holding some keys brings up additional key functions. For example, one could enter, in RPN mode: Mixed units are not possible, but the author says he's considering that capability.Īlso implicit in the units is a conversion. There are limits to this unit operation, however. However, the calculator display is much more modern than my simple abbreviation, so one actually sees: For example, one can enter, in RPN mode,Īnd obtain 1024 m^2. One of the things I like most about Calc Zero is the carrying of units. Infinite stack in RPN mode, X and Y registers shown.User set threshold for Engineering notation.Swipe display to change decimal precision.Soft groups: scientific, trig, time, length, speed, currency, and more.Optionally, enter and manipulate numbers as fractions.Units optionally linked to each number and carried along.21st Century interface, including multiple pop-up keys.Let's start with the developer's list of features. Examples are PCalc and the calculator reviewed here, Calc Zero (formerly OneCalc) from Uplake Media, LLC. The third class has those calculators that are best of breed for the iPhone. While very nostalgic and fully functional, along with being a bit pricey, they don't reflect the most modern thinking in calculator design made possible by all the features of the iPhone: soft key board, accelerometer, gestures, extensive math libraries and so on. The second class contains the throwbacks, working replicas of the classic Hewlett Packard physical calculators. Or even some of the very basic engineering calculators that support RPN entry logic.
(You can throw that away now, even though, in horizontal mode, it's a decent Algebraic scientific calculator.) Or tip calculators or those that partition a restaurant bill. The first class consists of simple calculators, like the one that ships with the iPhone. There are, in my experience, three kinds of calculators for the iPhone. Calc Zero is one of those and not only includes an option for units associated with each number, but is a new breed of calculator designed to fully exploit the capabilities of the iPhone and iPod touch.Ĭalc Zero will be of interest to any researcher, scientist or engineer who has an iPhone or iPod touch. Some merely compute tips, but only a few are designed for serious work by scientists and engineers. There are calculators of all kinds for the iPhone. As the last album before Bowie "rebooted" and formed the band Tin Machine, "N It must be a lonely place to be considered David Bowie's worst album by just about everyone, including the artist himself.Hailing from Austin, where I saw them live dozens of times, the band played entirely acousti "Supermodified" rolls through your expectations of breakbeat music, and turns them up a bit. Amon Tobin creates fantastic, groovy beats behind beats. Take the voice of a young Billie Holiday and stuff it into a svelte, petite body with the face of an angel, and you have some idea of what it's like to experience the music of Billy Miles in her self.Oddly enough, Playing The Angel is a return to form for Depeche Mode, even though it may well be argued that they never truly deviated from their roots in their more recent offerings.
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