Question

I am currently creating an app and would like to create a demo version (free) and a full version.

However, I am wondering how I can set some sort of flag so that when the demo version has been used 5 times, you have to buy the full version to continue using. This usage will be detected on a submit button.

I was considering setting a flag in the app, however releasied that the user could uninstall the app and then re-install it overcoming my set flag (as this would set it back to 0).

Has anyone got any clever solutions for my little dilema?

Thanks

Answer 1

You might want to try one of the techniques in this answer: https://stackoverflow.com/a/996288/1205715