PADListener synchronises your PAD monster box with PADherder.
You can watch a demonstration / guide on Youtube : http://youtu.be/tKrHvC7k03Y
To sum up, this application starts a local proxy on your Android device and captures the data sent by GungHo servers to PAD. It then syncs your monster box using PADherder's APIs.
You can browse the sources on GitHub : https://github.com/Neraud/PADListener
You can use GitHub issues if you encounter bugs.