For example, an Iowa district court in November 2006 halted all sales of See Clearly Method kits that had been marketed for several years by a company called Vision Improvement Technologies as a way to improve vision through eye exercises.
Jailbreaking is a hack that allows developers to access the file system of your iPhone, iPad, iPod Touch, meaning the root directory. In simpler terms it means that developers can now have access to all the files on your iPhone, iPod Touch, iPad meaning they can create apps that are possible of doing pretty much anything.
Read next: How to jailbreak an iPhone or iPad | How to unjailbreak an iPhone. 5 reasons to jailbreak your iPhone. It's your phone! You should be able to do what the heck you like with it; You can download your apps from anywhere, not just from the App Store; You can use alternatives to the default apps in iOS, many of which have more functionality