The Short Version
Appsfire is introducing today a powerful and innovative signal to assess whether an app is worth downloading. App Score is a dynamic score which processes dozens of parameters several times a day across all the apps in the iOS App Store. The App Score for a particular app goes beyond the current ratings, rankings and reviews for that app; it also analyzes the rating and ranking performance over time, incorporates additional metadata and reviews for that app across the web, identifies apps engaging in suspicious rating/review behavior in the App Store, and synthesizes the publisher’s record across all of his or her apps.
The Long Version