Regarding step #4 in Get to know Firebase for Flutter

• https://firebase.google.com/codelabs/firebase-get-to-know-flutter#3
• https://github.com/flutter/codelabs/blob/master/firebase-get-to-know-flutter/steps/index.lab.md

It should be pointed out to the reader that the starter code has some changes to the build.gradle and Podfiles. If the reader (like me) tries to build the app by copying the source in the lib folder to a clean new flutter project (eg counter) then the following changes will be missing.

For Android you must update the minSdkVersion in the Android/app/build.gradle file to minSdkVersion 21 or provide instructions on how/where to set the flutter.minSdkVersion

    defaultConfig {
        applicationId "com.example.gtk_flutter"

       minSdkVersion 21
        // minSdkVersion flutter.minSdkVersion // how to set?
        // targetSdkVersion flutter.targetSdkVersion  // how to set?
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

For iOS you must update the Podfile to platform :ios, '10.0' and should also update the iOS Deployment Target in xCode.

Likewise for macOS you must update the Podfile to platform :osx, '10.12' and should also update the iOS Deployment Target in xCode.