Simple Invoices is a program for invoicing, which in the author's intention is to be as easy to use as possible. The interface of the program is very clear and the way of navigation is intuitive, so working with it should not cause any problems even for those unfamiliar with the computer operation. From the functional point of view, the program's capabilities include issuing bills and various types of invoices (VAT, VAT MP, VAT RR, VAT margin, pro forma, internal, corrective), duplicates and corrective notes - also in foreign languages and currencies.

It allows you to keep a file of contractors and products, although it does not have (similarly to other programs from this group) functions for warehouse service. Allows you to modify the graphical layout of the generated documents. Does not support fiscal equipment.

Simple Invoices allows you to print transfer forms, and is also integrated with a package of payroll, interest and tax calculators. An optional English-speaking user interface is also available.