what is cydia and how do I check it
Cydia is a repository for programs and "tweaks" that are not available at Apples App Store. When you jailbreak your iPad/iPhone you install Cydia and that gives you access to many apps and tweaks that are both free and must be paid for. Start doing a little reading about whether or not jailbreaking is for you. Jailbreaking used to be a convoluted process that didn't always work but now it is pretty much push button easy. Check out evasi0n iOS 6.x Jailbreak - official website of the evad3rs and read about it. Simple and easy. Make special note as to which IOS version you have and which iPhone. That is important.