EXCELLENT Time, Expense, & Billing Application!

Im an independent information technology consultant. Ive used a PC based time and billing application for over a decade now. Even though it worked very well, I always had to be near my laptop to keep accurate records so some time just never got logged. I also had to keep paper records of mileage which was always a hassle. Since I switched to Time Master about 6 weeks ago, I keep much more accurate and detailed records. I especially love the way it handles expenses and mileage entries. I also purchased the optional Invoice module. Together they are a very powerful combo. Now I have everything I need to track time, expenses, and mileage right in my pocket. And the fact that I can also view reports to see where I stand billing wise at any moment and then invoice without ever having to open my laptop is just wonderful. I also downloaded and installed the free Time Master Central application on my Windows based laptop. Once a day or after any significant data entry in Time Master on the iPhone, I just use Time Master Central to backup the data to my laptop. It only takes seconds to do so. I originally installed Time Master 3.3 on my iPhone 4 with IOS 4.01. Within about a week I purchased the Invoice module through the in-app purchase. Both installs were flawless. I updated the iPhone to IOS 4.02 and then again to IOS 4.1 and experienced absolutely no issues. Everything worked flawlessly again. Bottom line: If you are a consultant that bills for your time and expenses, this is a "must have" application. If the optional Invoice module is not advanced enough for your billing needs, you can always export your data with the optional QuickBooks Export module or use Time Master Central to manually export data for import into an accounting or billing system. Probably the best $20 Ive spent in quite some time. Highly recommended!
Update 12/23/2010: Up to TimeMaster v3.6 on iOS v4.2 and still loving it. Really liked the "payment" addition to the invoice module in 3.5.
Update 9/30/2014: Up to TimeMaster v6.0 on iOS 8.0.2 on an iPad Air and iOS 7.1.2 on an iPhone 5. Using the Billing and Synchronization modules. Still love it and couldnt live without it. Cant believe its been almost four years of constant use. Highly recommended! With the newer versions you no longer need Time Master Central on a PC to backup the iPhone or iPad TimeMaster data. Its done via DropBox now and is lightning fast with the latest release of both TimeMaster and DropBox. And now backups can be performed on-the-fly no matter where you are.

RFSTech about Time Master + Billing, v6.0