BillingTracker is time billing and invoicing software for service industry professionals such as lawyers, engineers, accountants, programmers, and consultants. Anyone who bills time and projects, and demands ease of use will enjoy BillingTracker. BillingTracker Pro is time billing and invoicing software for service industry professionals such as lawyers, engineers, accountants, programmers, and consultants. Anyone who bills time and projects, and demands ease of use will enjoy BillingTracker. It allows hourly, project-rate, retainer, or even contingency billing, tracks outstanding client debts, has a built-in timer, and creates professional invoices to be printed or emailed.BillingTracker includes several easy to use tools to help you manage your professional business better. The built-in timer, for example, can rapidly switch between clients and projects. This lets you accurately record the small amounts of time that most of us end up working during the day - working on one project when another client calls for a few minutes, then an associate walks into your office to discuss a different matter, then a meeting, etc.