Hi! The BillingApi is the only way to do this and as you stated, we require that you implement it to be listed on the app store. You also mentioned that you want to provide a trial for your app and you are able to do that through the BillingApi as we...

> A simple setting like enabled or disabled, where is this data stored?   What are you enabling or disabling? You may want to add a database to your app or depending on what data you are storing you could use metafields   > If we make apps that shoul...