https://medium.com/@mayconbordin/ingestion-of-data-from-firebase-analytics-6b773033a822

Firebase is perhaps one of the best tools to track everything the users do on your app across multiple (Android and iOS) mobile platforms. You can use Firebase instead of going through your app stores and adding the numbers to get the total number of downloads per period.

You can check the converting rates of your marketing campaigns, tracking a user from the moment it clicks on a banner until he reaches a certain screen or does some specific action.