Transfer photos between Google+ and Facebook

Hi all,

At the moment I'm tending to use Facebook less and less so as a result when I share photos online I'm generally using a combination of the much more photographer Google+ and Facebook (for sharing with friends).

The problem is that putting the large files on both networks requires two uploads. I was wondering if there is a means of uploading a gallery on Google+ then being able to transfer the photos over to Facebook via some kind of web service app?

I've search on Google already but would just like to get some suggestions from the forum for a tried and tested app. Any help is appreciated.