PanGu is a free software tool that jailbreaks an Apple device and automatically install Cydia. Download PanGu onto your computer from PanGu.io, and then connect your device. Once the PanGu software recognizes your device, click Start Jailbreak, and the program automatically jailbreaks your device and downloads Cydia.
Cydia allows users to download software packages as an alternative to Apple's App Store. It is only available on devices that have been "jailbroken," meaning all hardware restrictions have been removed from the device. In order to successfully jailbreak a device, it must be in Airplane Mode and not be passcode protected. While jailbreaking reduces the restrictions placed on a device, it also places the device at risk of malware. For this reason, it is important to use caution when downloading software from Cydia.
Once a device has been jailbroken, Cydia offers a wide range of software packages including open source software and phone modifications. Most software available from Cydia is free, though some must be purchased. Using Cydia does not restrict a user's access to the App Store and many Cydia software packages actually act as extensions to Apple apps. Popular Cydia apps include Auxo, Zephyr and TetherMe, which are all only available for jailbroken phones.