Invoicing is something you should have under control. With UctoX, you have everything in one place including an editor which lets you customize the invoice however you want to.
UctoX 2 is a powerful, yet simple-to-use invoicing app - and much more! Unlike other invoicing apps, it also includes features of an accounting app: you can manage your bank statements, cash register, storage, journey log and much more! It comes with 3 built-in print templates, but using the print editor, you can create your own just in a jiffy!
Simplicity - UctoX 2 is designed to be used by the user without too much learning. But if you need any help, there's always a user guide available from the Help menu (OS X) or using the question mark button on main screen (iOS).
IiCloud - sync your accounts via iCloud - between all your devices (iOS and OS X).
Customizable - customize the template for printing invoices, bills and other documents just like you'd like.
Give it a whirl! - download a trial version above and try for yourself!