Sources for App data such as number of users, investments, annual turnover
For a research work I want to collect comparative data from different mobil apps. At first glance it seems to be difficult to get precise data from the different app providers (such as number of users of the app, investments, annual turnover). I find some information about the company, but these are often general and not product specific.
Does anyone know how and where you can find precise data on the net?