Semi-Restore by developer @coolstarorg is an application for your computer that allows you to “Semi-Restore” your device. This means that you can clear the data on your iOS device running iOS 5.0 – 6.1.2 while still preserving your jailbreak and Cydia.
Screenshot of the OS X Application
We were recently able to use the Beta version of the OS X version of the application and it seemed to do just what it was supposed to do on an iPhone 4th Generation running iOS 6. The cool thing about the whole process is that there is no need for SHSH blobs and its as simple as one click to erase the device and make it run like new again.
The current status of Semi-Restore is that CoolStar is porting the app over to Windows and once that is complete we can expect a pubic release. To follow the development of Semi-Restore follow @coolstarorg on Twitter and visit http://semi-restore.com.
Please be aware that this process can not and does not repair broken system files!