After looking at the security model, you might think that it takes somewhat more effort than Android to break into iOS apps. However, there are tech communities that are coming up with new ways of circumventing the security features implemented by iOS. Jailbreaking is one of the techniques used to remove the limitations imposed by the operating system on devices, through the use of software exploits.
Note
Similar to Android rooting, jailbreaking your iPhone will also void your warranty and support from Apple, so do not use your personal device for testing purposes.
The following screen capture illustrates the jailbreaking of an iPad using PP Jailbreak (http://pangu8.com/ppjb.html), with just a single click: