Saving Data on Android

Firebase Performance Monitoring
. The Performance Monitoring SDK collects 
information about your app’s performance, such as the app’s startup time or details 
about HTTP transactions. You can also use the provided API to instrument your app 
to measure critical moments that you want to improve.
Growing a business
Firebase has several products that you can use to methodically grow your app, gain 
more users and help you earn more money.
In-App Messaging
 helps you engage users who are actively using your app by 
sending them targeted and contextual messages that nudge them to complete key 
in-app actions, like beating a game level or buying an item.