is a package manager mobile app for i OS that enables a user to find and install software packages on jailbroken i Phones, i Pads and i Pods.

It also refers to digital distribution platform for software on i OS accessed through Cydia software.

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Some Jailbreaking tools (each of them supporting a specific set of devices and i OS versions) install Cydia automatically, while others provide a choice to the user.

Some of the packages available through Cydia are standard applications, while most packages are extensions and modifications for the i OS interface and for apps in the i OS ecosystem.

Some apps available on Cydia are also emulators able to run images of games for old game consoles, albeit without those consoles' responsive controllers.

Cydia enables users to find and install open source packages as well as purchase modifications for jailbroken i Phones.

These modifications are based on a framework called Mobile Substrate which makes it relatively easy to install and update said modifications.

UNIX command line tools are available on Cydia as well, including bash, coreutils and Open SSH.

After installing those packages the device is essentially turned to a full-fledged UNIX workstation, although without many development tools.

In March 2009, Tuaw announced that Cydia store is open.

The announcement summarized an experience posted by a website that Amazon payments was the only option available.

On December 15, 2010, Saurik IT filed a dispute with World Intellectual Property Organization against Cykon Technology Limited of Kowloon, Hong Kong over the rights to the domain name "", which was registered by its owner Cykon in 2002.

Saurik IT contended that Cykon registered the domain name in bad faith and the domain name incorporates Saurik IT's trademark.