FoxData offers free access to this feature: Chart Monitor

This page provides you with total number of apps Going up and down, New apps and Lost apps in the app market.

To better analyze data, you can use the following filters and options:

1. Click here you can select the app store or google play.

2. If the app you selected is iOS, you can click here to switch the different devices such as iPhone or iPad, however if you have selected the google play, there is no need to choose.

3. Click here to filter different country or region.

4. Click here to select different category to see more specific information such as games/overall rank or free/paid rank.

5. Click here to select effective change or all change. Effective changes will filter the list fine-tuning caused by individual app removals or other reasons, it would help you check changes that works or not for your business.

6. Click here to select different period of time.

You can click any chart under any date, and the page will turn to the Top Charts to provide you the more charts' details, like following pages.

For you have any other questions, please check out the link: Product Feedback