In this chapter, you will explore how to publish your app in the main mobile stores: Google Play and the Apple App Store. There are many small tasks that app developers need to perform when distributing their apps. Thankfully, some of these tasks can be automated. This includes code signing, writing metadata, incrementing build numbers, and creating icons.

We will be using the platform portals and fastlane, a tool developed by Google. At its core, fastlane is a set of Ruby scripts that automate the deployment of iOS and Android apps. Some scripts are only available for iOS, and some are not currently available for Flutter yet, but it's still a great tool that can save you a lot of time. 

The main fastlane tools you can leverage for your app's deployment include the following:

• cert to create and maintain signing certificates...