Simple currency conversion, using data from the European Central Bank.
I wrote the "Insight" data-logging software (for school science experiments) when I worked at the University of Leicester. Now I develop apps for iPhone/iPodTouch/iPad and Mac, using Xcode, Swift and Objective-C. I've worked with some great people on Freelancer, and developed some products that we're really pleased with. I take great care over my coding. I'm thorough, thoughtful, and I love learning.