Auto PDF generation on subscriptions

Hello, We are using subscriptions. However, we do not generate and automatically send emails to the customers with each renewal. Right now, PDF invoices are not automatically generating with each renewal. However, if I hit the button in the backend on the order, we can manually create an invoice. Then, the customer can download that invoice from their account login. My question is – can we automatically generate a pdf invoice with each subscription renewal? Is that a pro version feature? Can we do this if we do not auto send email confirmations to the customer? Thank you. The page I need help with: [ log in to see the link]