This one is really simple and easy to use. The in build categories covers most of our transactions and additionally it provides and option to add new / edit categories. Also it helps to manage cash from different accounts and facilitate to transfer money from one to another which helps to keep track of your money in different accounts. More over it supports notification centre widget, which is really helpful to track your expenses very quickly without even opening the app. It wont take much space in notification centre since you can set your preference what all details should be shown there which provides a minimised version of the app.
Prof: Moriarty about DayCost Pro - Personal Finance, v2.3