Cash Forecaster for iOS (iPhone/iPad/iPod Touch)
Get a quick snapshot of your finances by entering in your recurring expenses and income with how often they occur, enter an initial balance and see how your bank balance is faring. Enable and disable items to see how they affect you balance's trajectory.
You can group different sets of items so you can look at each of your accounts individually.
Cash Forecaster is available from the App Store.
For more information, contact firstname.lastname@example.org.