How to setup billing subscription?

I am launching a public app to the Google Play store. I would like to charge a monthly subscription fee for users but I don’t seem to be able to find any information about it.

Is this possible at all? or so far the only monetizing structure would be a one time fee to purchase the app?

Thanks for any help

If your app is a public public app and authentication is not used, I’m afraid you don’t have any control who can download and use your app

Correct but my understanding and please correct me if am wrong is that my other choice is to use the Secured PRO plan but that means I would be charged $10 per each active user? So if 20 people download the app from the store and subscribe appsheet would then charge me $200 that month?

Yes that’s correct.