Quicken Money Management
Platform: iOS, Free
Now that you're money is flowing, you're going to need a way to keep it under control. So, what better way than Quicken? [cough]
Use the Quicken app to connect to your sync to your Windows desktop software, and have your financial info anywhere you go. Don't forget to put in all of your information, though. You don't want to lose your empire's money.
Also, you don't need other people messing with your cash flow.