We use 2 data sources:
1. Store Data
Obtained directly from the app stores. We scrape store data daily and get publicly available data such as: ranks, reviews, descriptions, screenshots...
2. Proprietary Data
Shared by our App Publisher Partners. By connecting their accounts with us, we get access to their actual revenue and download numbers from the moment when their apps were launched (in plain terms, we are able to see historical data).
We have been scraping the appstores since September 2014, so our data set goes back to September 2014.
For more on methodology, check out our Methodology page.