'CancelUpdate' Allows You to Cancel the Installation of an App Update With the X Button
Application updates come out all the time. It's usually a good idea to read about the update before you install it, but sometimes the all-too-common butterfingers syndrome can cause you to install the update by mistake. After that, you may find something in the application update you don't like, and unless you have a backup of the last version of the application in your iTunes library, there's no going back.
To prevent this, a new free jailbreak tweak dubbed CancelUpdate
by iOS developer Plipala is now available that will allow you to easily cancel the installation of an application update by tapping on the ‘X’ button that appears when you put the device into jiggle mode.
Upon tapping on the ‘X’ button, you will get an alert that reminds you that the downloading progress will be lost if you cancel the update. You then get the choice to continue cancelling the update, or letting the update continue.
Notably, you’ll have to be pretty quick to catch the application before it finishes downloading and installing. This will be more difficult on faster Wi-Fi networks when applications are smaller because they download and install rather quickly, but for those larger applications that take a while to download, the tweak doesn’t come off as much of an issue for the user.
CancelUpdate doesn't have any option to configure and you want to give it a try, you will find it in Cydia's BigBoss repository for free. It may just save you some day.