Budget Tracker helps you keep track of your cash flow. It is a simple and practical app which could help you forget about doing all the manual tracking of your income and expenses. It will do the remembering job for you. All you have to do is input your monthly budget and all your expenses.
There's a pre-loaded set of categories which you could use to help you categorize the expenses that you have made. You could also add your own category if it does not exist yet.