Welcome, first release of Mark Calculator code. This was done a long time ago so I'm sure there are tons of gross stuff in there, I'll hopefully get to clean it up one day but for now, email me at ryanwils@gmail.com if you have any questions about it!
You can find it in the app store at https://itunes.apple.com/ca/app/mark-calculator/id434291749?mt=8
Hopefully writing a better README later on too...
Just please don't just take it and distribute it as your own, add something to it at the very least!