Manage free version and paid version in Flutter

Question

What is the best way to manage free version and paid version using Flutter?

What I have checked

• One dirty way is having two almost identical projects, and building one as a free version and the other as a paid version.
• Another way is implementing differences between versions as features after in-app purchase. (I might go with this if there is no better way.)
• I found info for Android and for iOS (which are the ones written above), but does Flutter provide a better way?

Environment

• 1.12.13+hotfix.9
• Dart 2.7.2

Answer 1

Two ways to do this:

1. Implement in-app-purchases with a non-consumable (if you want to unlock premium features 'forever')
2. Create a subscription that a user purchases to unlock premium features (potentially combined with a free trial period) for a period of time

Anything else is likely to get blocked by the App Store and Play Store review process.