If you’re a freelancer, or running business by yourself, you undoubtedly have the need for a quality invoicing and time/expense tracking application. One of these applications, by Stunt Software, is On the Job, which recently hit version 3.0.

The bare bones to On the Job provide for tracking time and managing the billing for multiple clients. For each client, you can set up custom hourly rates, mileage rates, and taxes. Then, you’re off to the races by creating specific jobs and job items for each client. Entering items and getting started is fairly simple, for the interface is intuitive, simplistic, and makes sense.

For each Job item, you can either charge by the hour, as a fixed cost, or set up the sale of multiple quantities. The time tracking aspect to On The Job is very well done. You can either start tracking by clicking the large play button on the main window, or via the menu bar icon, from which On the Job will continue to track time in the background. Each job item can have multiple timing sessions assigned to it. If you need to charge for gas mileage, you can do that as an item as well.

While it’s important to track the work that you perform, it’s vital to charge for such work. On the Job includes a built-in invoicing system. By using one of the built-in templates, or creating your own, you can easily charge and bill your clients. The invoices are easily, and completely customizable. You can create invoices based on date ranges, clients, or specific jobs. Each invoice can then be exported as a PDF, printed, or sent directly to an email message. On the Job will also track invoices that need to be paid. You can mark an entire invoice as paid, or apply multiple payments.

Unfortunately, I’ve had some trouble with On the Job’s invoicing. It is constantly skipping job items when pulling information for an invoice based on a date range. I have concocted a work-around, and it seems to be working a bit better now. To be specific, the problem occurred when charging for Job items that had multiple timing sessions that were out of the date range. Instead of pulling the specific timing sessions in my date range, it wouldn’t include the entire job item.

While my individual experience was frustrating, I was able to get it to work. I’ve been very impressed with the fluidity and simplicity that comes along with On the Job. It is a $39 application, with a free trial.