If you haven't Jailbreak your iPhone, iPad or iPod, that means you are still not utilizing the maximum potential of your device. Jailbreak can open unlimited opportunities to make the best use of you Apple device. When you buy your iPhone from the dealer, It's originally restricted to access system files and not allow to install third party apps although only very less and limited apps are available on iTunes. The Cydia is only solution which you can get unlimited third party apps on your iPhone. But you can't directly install cydia. You must have jailbroken your device before install Cydia. Jailbreak is the process which grant privileges to access system files. Cydia is acting as an alternative App market. You can Download Evasion for Jailbreak iPhones, iPads and iPods running on iOS 6.0 to 6.1.2. EvasJailbreak for iOS 7 and iOS 6.1.3 is not yet available.