It's been 8 months since you were asking how to get back the Unfriend Finder application. Since Facebook has changed their API and removed some capabilities, such us getFriendList function, and ,hence, our Facebook application has stopped. After many months of work, we found that we can get the friendlist of Facebook users by using browser extension rather than Facebook API.
We are now happy to introduce our new product: NEW UNFRIEND FINDER. It has partically the same function as the previous Facebook application, It only require you to keep it installed in your browser in order keep monitoring your Facebook Friendlist.
Download the extension or install the application on your Android Device.