Catch bugs as soon as they happen and know exactly why a crash occurred. With Instabug you will automatically receive device data, network logs, and reproduction steps with every bug and crash report. It only takes a line of code to integrate.
SwiftCSP is a constraint satisfaction problem solver written in pure Swift (no Cocoa). It utilizes a simple backtracking algorithm with plans for future optimizations. At this stage of development, it's fairly slow but it includes examples of solving actual problems. It runs on both iOS and OS X.