So far I've been using MoneyBook on my iPhone. The problem is that I'm forced to reach my phone when I'm using my iMac, MacBook or iPad and I want to add some expenses. Keep in mind that I'm looking for something simple. By no means I'm an accountant I just want to keep a record of my expenses and incomes in categories and with some nice icons and GUI. Of course, it should have an iOS version so everything is synced. Thanks!