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By Josh Rosen

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Chalkboard is an unconventional, yet intuitive, "calculator." It allows you to describe equations the way you would with traditional paper and pencil. Only now, the number crunching is done for you, at the press of a button.

Chalkboard has many features that are both highly convenient and functional. Instead of having to memorize numbers, all you have to do is assign them to a variable for later use. Or perhaps you have a complex equation that's always hard to remember? Now, just create a function for it and you'll never have to worry about it again.

On the technical side, Chalkboard is designed to emulate the functionality of a programming language, while maintaining a syntax with the potential simplicity of a traditional calculator. Along with functions and variables, Chalkboard also supports for-loops, lists/arrays, strings, complex numbers and graphing. Chalkboard is also fully extensible -- you can add an unlimited number of functions and variables and keep them for later use.

What's New in Version 3.32

* 3.32 Changes

o Implemented double precision calculations
o Added support for scientific notation input
o Input list interface fixed

o Added floor function
o Added round function
o Added rand function to index
o Fixed comparative equals operator
o Added date and time functions
o Gave the icon set a hole new look
o Changed launch behavior, no longer shows intro screen

iPhone Screenshots

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Customer Reviews

Still buggy!

I really want to like this app, since it does pretty much what I want -- when it works. However, it is still very buggy. For instance, I wrote a simple equation, Vout=1.25*(1+R2/R1), and told it to evaluate it. It told me there was a divide by zero, not once, but FIVE times (why five?) in succession. After that, I supplied nonzero values for R1 and R2 (as function parameters) and tried again, but it still kept insisting there were five divide by zero errors, apparently somehow remembered from before. Not acceptable. Also as others have noted, input is way too awkward.

Awesome Calculator!

Very good calculator. The email support was very fast and good as well. Thanks!


I guess it is okay... Someone needs to finally make a calc that can do fractions.... This one toots his own horn about notin.

View in iTunes
  • $0.99
  • Category: Education
  • Updated:
  • Version: 3.32
  • Size: 0.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 2.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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