Logentries is an easy-to-use, self-hosted log management and analytics service for teams of all sizes. It is integrated as a Heroku add-on which makes it simple to search, analyze, and manage the logs.
Mixpanel API is integrated to the Flutter app to track the events in real time. It helps to analyze the user's behavior in the app and see if the application and its features are intuitively clear to the users.
Fastlane is a perfect tool for the build distributions. Its pretty simple settings allow composing the app builds just with one command. For Flutter it is set up for distributing Crashlytics and Test Flight builds.