According to TheNextWeb.com, the app is similar to Who Unfollowed Me for Twitter, which tells the users when friends have disappeared from their list and whether they have deactivated their accounts or actually deleted the user. When the users download the app it will not show them friends who have deleted them in the earlier period. It only starts tracking from the time the user activate it. Also, it shows the users their newest friends, people they have chosen to block and a ‘last seen’ stamp for everyone in their list. The App has been created by Exeter-based developer Anthony Kuske and is available for free on Android and iOS. There is also a free browser extension for Chrome. The app used to be available on Facebook till April 2015, but had to be removed after Facebook updated its policies. You can download the App for your Android smartphone from here and for iOS devices from here, while the Chrome extension is available here.