InvoiceTrackr is described as 'Is software as a service that enables you to input your customers, products and services. You can then create billable line items by time or unit and create pdf invoices based on tracked products and/or services' and is an app in the business & commerce category. There are more than 100 alternatives to InvoiceTrackr for a variety of platforms, including Web-based, Windows, iPhone, Mac and Linux apps. The best InvoiceTrackr alternative is GnuCash, which is both free and Open Source. Other great apps like InvoiceTrackr are HomeBank, Odoo, ERPNext and Manager.