Is maybe a feature of another app? I have WhitePages and Reverse Call Lookup installed. The latter is one that rates unknown numbers on a scale from OK to Spam. Recently Google enacted some changes where apps can no longer draw directly from the recent call list and number have to be copied and pasted to the app, perhaps this belongs to an app but with the new restriction it can't do anything because that would be drawing information from your recent call log and the dev. just forgot to remove it?