8/8/2023 0 Comments Soulver ios appIt mimicked the look and features of a pocket calculator. In 2005, an Australian high school student named Nik Youdale built a small calculator app over the summer. Its users sing its praises in Mac App Store reviews. It has a single-value display, “keys”, a separate “paper tape” window, themes if you want it to look like a physical calculator, and 3 memory registers like the best HP and Casio machines out there. It shows a log of your calculations and looks like this:Īnother well-loved calculator app on macOS is PCalc. Optionally, if you know the keyboard shortcut or go looking through the menus, you can show a second window called a “Paper Tape”. A display showing a single value at a time.It uses metaphors from the physical world, such as: But we don’t design tools just for the lucky few, do we?Īpple’s Calculator app on macOS imitates an electronic calculator. Some humans have excellent attention and working memory. If you give important information to an information system and it disappears as soon as you enter it, you can’t check your work. If a calculator couldn’t show this: 38 ÷ 1.2 I had a Math teacher who would ban pocket calculators that didn’t show both your input and its result at the same time. We’ve lost many points on Math tests because of a momentary lapse of attention, because of finicky calculator keys. To some of us, this is a familiar experience. Here’s what happened: you hit the 8 key instead of the 5 key and then the ÷ key instead of the × key. What went wrong? In this case, you made a couple mistakes while inputing the calculation. You could try again, but your confidence is shaken. With luck, you know that multiplying 35 by a number higher than 1 should give you a result higher than 35, not lower. You whip it out, type on the keys, and the result looks like this: $4.99 -> $1.Let’s say you want to calculate 35 × 1.2, and you have a pocket calculator.
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