How to propose a demo/trial version of an electron app?


Dear Electron lovers,

I recently developed a new Electron app: canSnippet ( I would like to propose a demo version of my app, let’s say 15 days of trial. However, I have no clue on how to implement that. I don’t have any server-side code, so I cannot “control” the demo time from the server. Is there a standard way of proposing a demo version of an electron app ?
Thank you very much for your help.