FoxData offers free access to this feature: Store Monitor
This page provides you an overview of the market. You can monitor releasing or removing information.
Pulling down, you can see released/removed apps in category in different time period.
Select operating system and Country.
1.Click here you can select the app store or google play.
2.Click here to filter different country or region.
At each chart, you can filter the information you want to see with the filters in the top left corner and set the period in the upper right corner.
And click on the More button, you can jump to pages which have detailed information.
Tip:
What is Keyword Searching Results Change Rate?
The change rate of top 10 apps in the keyword searching results in the selected time period.
For you have any other questions, please check out the link: Product Feedback