Cydia Impactor

Cydia Impactor is a multifunction tool available for Windows, Mac, and Linux, created by Jay Freeman (saurik), used to sideload IPA files on iOS, and APK files on Android. It is able to exploit the series of Android "Master Key" vulnerabilities.

Apps installed with Cydia Impactor are signed for seven days using a free developer account associated with any Apple ID, or one year if the user has a paid developer account.

Cydia Impactor has been used to accomplish semi-untethered jailbreaks on iOS devices in recent years - specifically, it is used to sideload the IPAs that are then used to jailbreak, the first of which being Pangu9 for iOS 9.2 - 9.3.3.

As of around 2019, Cydia Impactor's IPA sideloading feature no longer works with free developer accounts, displaying an error that the user needs to upgrade to Xcode 7.3. As of 2022, it no longer works with paid developer accounts. It has been replaced by Sideloadly, SideStore, and AltStore.

Cydia Eraser
Cydia Eraser, a tool similar to SemiRestore that can be used to erase the device and preserve the iOS version, was previously called Cydia Impactor. However, saurik chose to change the name to Cydia Eraser to prevent confusion.