Hi, Freelancers. I has already an android app published to App store and it's successfully. But to increase android app monetization, I'd like to update it with payment integration.
In a nutshell, users can download app and use it for free for 5 months. If they like it after 5 months, he can subscribe to the auto-renewal monthly subscription and continue to use it. But if he doesn't like it and pay, he can't use app anymore. Currently, my app has not payment function. so I want you to integrate the app with payment 3rd party API .
If you checked the job detail, please start the cover letter with "java expert"