
Apple may be implementing some changes to the way that it ranks apps for its Top Charts in the App Store, reports TechCrunch, citing studies from a number of app analysis services. It appears that new factors, such as app ratings and user engagement, could be influencing app position and preventing developers from artificially inflating the rankings.
According to app marketing service Fiksu, app rankings began fluctuating in late July, favoring apps with ratings of four or more stars in the App Store. While those apps jumped to higher positions without a corresponding increase in downloads, apps with poor ratings saw their rankings fall.

Niren Hiro of SearchMan told TechCrunch that user engagement may be a factor as well. Time spent within apps, the number of app opens, and ongoing usage are affecting category rankings, as noted in the chart below.We suspect they are adding a 'buffer' period to prevent rank manipulation through short download bursts often associated with robotic downloads and other actions not in the best interests of the app ecosystem. Three hours allows enough time to identify anomalies and remove apps before they suddenly appear at the top of the rankings.

It remains unclear whether Apple is merely experimenting with its App Store rankings with these new inclusions or if it is in the process of making sweeping changes to the ranking process. App discovery has long been a work in progress for the company and efforts to improve its ranking algorithms could help users locate higher quality content.
Article Link: Apple Implementing Changes to App Store Rankings to Promote Better App Discovery