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I had contributed the вЂњliberal artsвЂќ design side of things (i.e. It also, in a way, mirrored the skillsets of its creators. To me, this feature represents the вЂњsoulвЂќ of Soulver and it was this flexibility that allowed the tool to enable workflows we had not foreseen, and over time develop a fan base of passionate users. With this feature you could now write an expression like вЂњ$50 for lunch + $15 for the taxiвЂќ and get a useful answer. This feature seems kind of obvious in retrospect, but to my knowledge Soulver was the first tool to let you do this. It was inspiring to feel part of a community, and it was this feeling that stimulated our continued development on Soulver and our next breakthrough idea: allowing words to be used alongside numbers and calculations.

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Being in the room at a real Steve Jobs keynote was a dream come true, and for the first time, we got to hang out with other Mac developers working on great вЂњdeliciousвЂќ apps, like VirtueDesktops, AppZapper and CoverSutra. As university students with a decent Mac app in the world, Nik and I were fortunate to win student scholarships to WWDC, which at the time included flights, tickets & accomodation near the Moscone center. Nik began a degree in electrical engineering and computer science, while I started a bachelor of arts program, with a focus on languages, history and philosophy. We also added a stack of additional features weвЂ™d thought would make Soulver more useful, like global variables and live references to previous lines.ДЄ screenshot of from the Soulver website, April, 2006 Our parents thought we were nuts trying to learn C when our final high school exams were just a couple of months away! Everything turned out fine though: Nik and I topped our school in the exams, and the following April (2006) we released a new version of Soulver completely rewritten in Cocoa.

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Nevertheless, once a week weвЂ™d get together to work through a series of video lectures on C, bit-by-bit becoming more competent and confident programmers.

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This was real software engineering, and not something that seemed designed for amateur teenage coders like ourselves. First we would need to learn a notoriously low-level programming language called C, followed by yet another language called Objective-C, along with o bject-oriented programming concepts, and finally the Cocoa framework. Nik was confident weвЂ™d be able to teach ourselves Cocoa, and rewrite Soulver as a native Mac app. Soulver for X in Both Mac and iOS I discovered Soulver via a colleague years ago, when it was a less sophisticated program, and other options were slim.

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It turned out that REALbasic was using a transitional Apple technology called Carbon under the hood, instead of the Mac OS X native framework Cocoa which produced the most beautiful apps. The problem was (we thought) that as a piece of Mac software, it didnвЂ™t feel completely native. We were disappointed to only get a few hundred downloads of the app, and less than 50 sales but we still felt we were on to something good. Me, demoing the first version of Soulver to my classmates & teachers, May 2005

It would be like a calculator, a pencil and a notepad rolled into a single tool! I drove over to NikвЂ™s house to share my idea with him: what if the calculator was actually part of вЂњthe pageвЂќ? Instead of duplicating work (first writing your expression on a pad, punching it into a calculator, and going back to the pad to write in the answer), we could stick an вЂњanswer columnвЂќ to the right of a standard text editor, which would calculate line-by-line as you typed. The solution to вЂњthe calculator on computersвЂќ problem came to me in a flash of insight one morning in January.

It seemed to me like the traditional calculator design that had been copied on computers just didnвЂ™t take advantage of all the power of a MacвЂ™s graphical interface with its powerful text processing features. I couldnвЂ™t understand why it only displayed a single number at a time, and why it wouldnвЂ™t evaluate an entire mathematical expression like youвЂ™d see written out on paper. My friend Nik had built a classic calculator app over the summer as a hobby project, but I wasnвЂ™t particularly impressed.

168 live real-world and cryptocurrency rates.The standard Mac OS X calculator app in 2005, mimicking a physical calculator.

Unit conversions ('10 kg in pounds, '25 meters in feet').

Calendar calculations (June 9 + 3 weeks, 3:35 pm + 6 hours 27 minutes).

Quick totals of all your lines, and subtotals.

Use words alongside numbers, so calculations make sense.

Instant calculations, no equals required.

It's a better way to work stuff out than with a traditional calculator, and a more lightweight tool for quick calculations than a spreadsheet. It gives instant answers to any calculations it finds in your text. Soulver 3 is a smart notepad with a built-in calculator.