It's a sample app used as an example for my talk Maintaining Multi Favor Android apps

Features I use here:

• build types
• product flavors
• source sets
• build config fields

By using source sets and gradle compile by flavor, premium application has no single code related to google play services and firebase ads

Screens of app:

Free flavor, login page:

Free flavor, main page:

Premium flavor, login page:

Premium flavor, main page: