Cydia

Cydia is a software platform used primarily on jailbroken iOS devices like iPhones and iPads. It allows users to access and install custom apps, tweaks, and themes that aren’t available through the official Apple App Store. By using Cydia, users can personalize their devices beyond Apple's restrictions, adding features or modifications to improve functionality or appearance. It functions similarly to an app store but relies on community-developed content, offering greater flexibility and customization options for technically savvy users.