There are many sources and forms of data that are currently available for App Developers/Owners/Marketers to better understand their customers and their app usage patterns. Many sources (i.e. Apple AppStore Analytics, Google Analytics) are free and there are many benefits from reviewing and analyzing the data on a daily basis.
Often app owners spend time on the cost of acquisition of users but fail to look at who these new users are, where they came from and what actions they are performing within the application.
@Apppromo we make a practices of reviewing data and also encourage our customers to continue to review new and old data as long as their application is in market.