Each time its home button is pressed an iPhone automatically takes a screenshot of the current app to display a zooming effect.
For this performance, I installed two shell scripts on my jailbroken iPhone:
1 The first one duplicates each screenshot so that the files cannot be overwritten the next time the app is minimized.
2 The second one uploads these screens automatically to this site and publishes them.
These scripts are executed regularly in the background by means of launch daemons.