Today, Cydia creator Jay Freeman (Saurik) released an update to his tool Cydia Impactor, which allows the signing and installing of .ipa files to iOS devices.
With it comes a new tool called Cydia Extender, which allows installing and re-signing of .ipa files on-device. However, don’t get too excited by this news; it is not the solution to the 7-day signing problem that many have been waiting for.
The Yalu jailbreak, just like the Pangu jailbreak before it, relies on certificates that have expiration dates. You have to re-sign the jailbreak with Cydia Impactor past the expiration date to keep your jailbroken state.
No matter what kind of certificate you have, whether it’s a regular 7-day certificate or a 1-year developer certificate, it won’t last forever, and a new jailbreak app called CertRemainTime by lululombard can help you keep track of it.