The app lets you add several different accounts so you can keep separate records for your credit cards, cash, and online accounts (such as Paypal, etc.). You can also use different currencies, which is especially useful if you have online accounts in dollars.
When you add up your expenses or income, you'll have to write a memo, an amount, and a date. The entry will then be registered and you'll be able to see it in the center of the screen along with the other entries.
Expenses is a simple money management tool without too many features, though it still does everything it promises. A good app for those who want to keep track of their accounts without too much hassle.