AppData is a website that shows usage metrics for Facebook applications. If you've visited the "Links" page of this blog, you might have noticed the link to the AppData for Empires & Allies.
The two major usage metrics are DAU and MAU:
- DAU = Daily Active Users; the number of Facebook-authenticated users who used a particular Facebook application at least once in a given day
- MAU = Monthly Active Users; the number of Facebook-authenticated users who used a particular Facebook application at least once in a given month
AppData uses DAU and MAU as reported by Facebook.
