


Cydia utilized the tried and tested package delivery system that is being used in UNIX like operating systems, like Linux, called APT. Installer used XML files to transport the information, just like in RSS feeds. One of the reasons why Installer was discontinued is the way it delivers the application to the phone of the user. On the other hand, Cydia is an open source application, which is a contributing factor to its longevity. Installer has been a closed source application from the very beginning up till the end, making its revival quite unlikely. The biggest difference between the two is that Cydia is still being actively developed while Installer has been dropped by its author to pursue another package management application called Icy, which is compatible with Cydia repositories and can download applications from there. Cydia was created much later to address some of the shortcomings that Installer had. This application allows users to download applications to their jailbroken iPhone without going through the Apple App Store and their strict regulations. This need spawned the production of Installer.app. Apple’s strict rules and regulations on what can and can’t be sold in the Apple App Store has prodded a lot of developers to seek for other means to market their products to iPhone users without using the Apple App Store.
