BizSugar.com › Technology › Best Sources For Cydia That iOS Users Should Know

Although Apple might hate you for jailbreaking, it does give you access to some serious amount of tweaks for your iDevice, that let you customize the behaviour of the OS exactly as you want. You can even make your iDevice look different, not just with a custom case or a sticker but changing how the software looks itself.

Cydia is installed by default on every jailbroken device, without Cydia jailbreaking your iOS device would be worthless.