We refit parameters for the new Google Play categories using the data we’ve collected since their introduction in September. The new categories are as follows:
Art & Design
Auto & Vehicles
Food & Drink
House & Home
We expect this to result in more accurate estimates for apps assigned to these categories. In addition, we adjusted some of our estimates downward in order to make them more consistent with the latest Google Play Store all-time download ranges displayed on the individual app pages. This adjustment impacts roughly 9% (~178K) of the apps in the Google Play portion of the platform.