Jack Rabbit Mobile designs innovative applications for mobile phones and tablets. This American company has many years of experience in building apps for devices that are powered by the iOS platform. Apple's operating system is designed to support features that are written in just a few programming languages. The majority of the source code of iOS apps consists of Swift, which was originally licensed by Apple. Over the years, this language evolved into an open source tool that is available for free. Another useful technology for iOS app design is called Objective-C, which is often paired with C++ and C. These programming languages are actually derived from software that has been published by Microsoft. The aesthetic components of iOS apps can be created with licensed programs that are offered by Adobe and other similar companies. Logos, icons and other colorful presentations can add a lot of appeal to the front end of a mobile app.