Cydia is a software application for iOS that enables a user to find and install software packages (including apps, interface customizations, tweaks and system extensions) on a jailbroken iPhone, iPod Touch or iPad. Cydia is the main independent third-party digital distribution platform for software on iOS. Many of the software packages available through Cydia are free, and it also includes several hundred packages for sale through the Cydia Store payment system with a commission setup similar to the App Store. Most of these packages focus on providing customizations and modifications (often called tweaks) that can only run on jailbroken devices (since the App Store is limited to distributing self-contained apps). Cydia is a graphical front end to Advanced Packaging Tool (APT) and the dpkg package management system, which means that the packages available in Cydia are provided by a decentralized system of repositories (also called sources) that list these packages. Cydia is developed by Jay Freeman (also called saurik) and his company, SaurikIT. The name Cydia is an allusion to the Codling Moth, with a scientific name of Cydia pomonella, which is the proverbial
Contributions by Brianreading, Dreamyshade, and Garlikguy2.