Deleting people from Facebook is seen as the ultimate insult for many, and now there’s an app that lets you track such affronts.

Called Who Deleted Me on Facebook, the app does as the name suggests – it reveals which contacts have unfriended you on the site.

It also shows which of your friends’ accounts have become deactivated, who is online and keeps a track of friend numbers

The app was 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.

Once the app has been installed, users connect their Facebook account by signing in securely.