Ok, now I have the subscription implementation ready and a client already used it to subscribe to my app. Now what?
I have to handle invoicing them as well?
No, the subscription will invoice the customer on your billing cadence. 
Ok, now I have the subscription implementation ready and a client already used it to subscribe to my app. Now what?
I have to handle invoicing them as well?
No, the subscription will invoice the customer on your billing cadence.