This document discusses testing RubyMotion applications for iOS. It notes that manually building and clicking through apps on devices and simulators is time-intensive, and crash logs can be difficult to decipher, leading to "crash driven development". The document advocates separating business logic from API calls through testing, which encourages object-oriented design and makes it easy to spot bugs and add features. It provides a link to a sample RubyMotion app with testing called Quotidien.