Accounting and Invoicing
Odoo Invoicing is a standalone invoicing app to create invoices, send them to your customers, and manage payments.
Odoo Accounting is a full featured accounting app. Accountant productivity is at the core of its development with features such as AI-powered invoice recognition, synchronization with your bank accounts, smart matching suggestions, etc.
Source: Accounting and Invoicing — Odoo 13.0 documentation