The App Store lets you discover hundreds of thousands of applications that you can download for your iOS device. Browse the App Store for games and apps for business, entertainment, and more.
Cydia is a Debian APT package manager that lets you download tweaks and apps that haven't been approved by Apple for your jailbroken iPhone, iPad and iPod Touch, via repositories.
On December 13, 2018 Saurik has announced that the Cydia Store is shut down because of a bug with Paypal and lack of funds. He recommends to remove the saved Paypal info from the Cydia account and assures the users that he intends to maintain the ability to download existing packages. https://www.reddit.com/r/jailbreak/comments/a5wfq9/news_andrew_wiik_recommend_that_everyone_removes/ebpur5a/?context=1