BillingTracker Pro Invoice Software is a shareware ideal for professionals like attorneys, accountants, engineers etc. The professionals in service industry who bill on the basis of time and project use this time billing and invoice software. This software helps you create bills on hourly basis, with fixed fee and in recurring or contingency forms of billing. It has a built in timer to calculate the time you have worked on a particular project and can automatically shift to other projects timing as you shift to other project. It also calculates the client’s outstanding and then creates the invoice for printing or emailing or for saving in other file formats. You can create your own invoice format or use the default ones. The report tool of this package can help you create various reports which may contain the details of number of hours spent on a particular project, outstanding of one or more clients, pending projects and their deadlines, and also the cash flow figures. Billing tracker also calculates the days between the invoice dispatch and payment made and it gives an alarm if you are not paid by your client on time.