If you have the same tabs as in the picture (Home, Customers, Invoices, Reports), then YES!
Managing invoices is a pain. We think that all entrepreneurs should have access to a tool that makes this process as quick and simple as possible. This means also that any limitations of sending invoices and estimates creates barriers for small business owners. Therefore, we decided to offer a free invoicing product.
Of course, also we need to make money. In the future, we therefore may add premium features to Zervant. But don't worry, you will never have to pay for the current features in the software. They'll always be free!