Coding sample for application to Apple's Cocoa Camp 2013. Applicants were asked to write an iOS application with the following requirements:

Please write an Objective-C app that:

• Runs on an iOS device or in Simulator
• Converts a user-entered number from one currency to another
• Does not use third-party source code (for example, code found on github)

Some other things you may consider implementing:

• Multiple conversions (from one currency into multiple)
• Images (such as a picture of the currency or a country flag)
• Formatted values to account for currency symbols, positive and negative amounts, and so on
• Real-time currency conversion rates
• Related Wikipedia content
• Unit tests