Top Apps contains a list of apps that are ranked by several metrics:
App Name: Name of the App as it appears in the App store.
App Publisher: Publisher of the App.
App Category: Google Play's main category for this app (note that certain categories in the Play Store store are not considered main categories, e.g. Family, Android Wear, etc.).
Similarweb Usage Rank – (available for Android apps only).
Store Rank: App's store ranking in the chosen store; country, category and leader board, updated daily.
Change Columns: Daily change for Store Rank and Usage Rank
Store Change: Daily change of Store Rank.
The list can be filtered by store (Google Play and Apple App Store), country, category and Top Leaders. When filtering the App Store, there’s also an option to filter for iPhone or iPad. Store filter located at the top of the page.
In addition, the Top Apps by Category metric includes the top 5 apps under the top 4 most popular App Store Categories in the App Audience Interests app list.