Application Licence System

I Want Licence System Because I Want To Sell My Project To Others Peoples. So They Can Buy For A Limited Time

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That what google play does!
You can sell lifetime license(one-off) or a subscription for certain time.
All managed by you from the google play console. The licensing system in android is a complete different model to windows software distribution.
Here’s a lot of info on how to sell your app. Good luck!