This add-on brings the Recurring Invoices features found in the paid versions of Sprout Invoices to the free version.
Recurring Invoices provides a way for you to generate new invoices on a schedule. Unlike Recurring Payments entirely new invoices are created.
Your settings will generate a copy of the invoice on a schedule, alleviating the need to login and use the existing duplication feature.
Generated invoices keep a relationship of the master for easy tracking.