DataForSEO Labs API is designed to provide you with keyword research, market analysis, and competitor intelligence capabilities.
Google Play endpoints of DataForSEO Labs API are designed to provide you with keyword, app metrics, and SERP data from Google Play
Using this API, your account will be billed for both setting a task and receiving its results.
The number of rows you can get in response is limited to 1000, so you will have to make 1,000 requests in order to obtain 1M keywords or apps and related data.
Given that the price for setting a task is $0.01 and the price per each item is $0.0001, the price for 1M keywords/apps is calculated as follows:
1,000*0.01 + 1,000,000*0.0001 = $110