What is Cydia?

Cydia is an iOS apps with GPL v3 Licences but it can't install manually .It's installed automatically on the winterboard after jailbreaking by evasi0n or redsn0w only .Generally, Cydia is parallel to the apple apps store,It's like another  apps database,It control  unauthorized iOS application these apps have licence free  but some apps are purchase anyway this is good , The beauty of Cydia is able to install unauthorized iOS apps in the same directory as define Apple company.So there are no problem to run otherwise it not run properly.

Cydia release for Android operation system devices but it is not successful.anyway recently Cydia rule Android.

Cydia is a open-source package manager tool and it has excellent graphical interface and user friendly also.

Features of Cydia 

• Support only iPhones,iPads and iPod Touches.
• It has standard packages some are free and some are in low price.  
• Automatically inform update,upgrading and available new apps
• It save money ant time.
• There are lot of section example cydia apps,cydia repositories,cydia tweak,cydia themes .....
• Some UNIX commands are allow in cydia

What is iOS Jailbreaking?

According to the Apple company law,anybody can't install new apps on apple mobile devices (iPhone,iPad,iPod Touch and apple TV)without their permit that is can install apps from itune apps store web site.However some of these apps has some reasonable price some are free.Out of apps store thousand of best iOS apps are available for free but it can't install and run it because of the law.Then Developers found the method to remove the control of the iOS is called Jailbreaking.

Jailbreaking is not a physical way it's done by software without harm of apple devices and it is not an illegal method.
After Jailbreaking, Cydia will appear on the winter board ,by touch Cydia icon install awesome apps out of from itune apps store for totally free.

iOS Jailbreaking Method 

• Untethered -This is best method any disturbance once it jailbreak and no need to PC when reboot the jailbreaked apple devices
• Tethered-This is one of easy method but some interruption when reboot ,it want PC for every reboot the jailbreaked apple devices.  

Special iOS Jailbreaking Tools on 2013 ,2014(Software Name)

• JailbreakMe
• Seas0npass
• redsn0w
• Absinth
• greenpois0n
• p0sixspwn
• evasi0n
• evasi0n7

Special iOS Jailbreaking Tools Developers

• iPhone Dev Team
• niacin and dre
• Comex
• pod2g
• Chronic Dev Team
• evad3rs (pod2g, MuscleNerd, pimskeks, and planetbeing )