Does this have subscription feature?

i can’t’ see the module after installing it. help

This is a fantastic module, and it works great. However i have noticed, its mandatory that a customer log in to the system to make payment when i have sent an invoice to them, could you remove this limitation, or tell me how i can disable this limitation.

i want anyone sent the link, should be able to make payments for it.

Great work !! All the best with sale..!!