When evaluating software, assess its user-friendliness and look for time-saving features, such as automatic sales tax calculations, payment reminders, and recurring invoices.Be sure to check if the software can integrate with the accounting program you use, as well as popular payment gateways. Integrations with accounting software and online payment gateways are essential to streamline billing processes.Most free software is subject to limitations, such as the number of users, the number of clients, or a specified time period.Things to Consider When Evaluating Free Invoice Software: