Checkbook HD is a universal app that runs on both the iPhone and the iPad. The app works like you would expect a checkbook to work. You simply enter all of you account info into it and start using it as a checkbook replacement. The app supports importing data through OFX file formats and exporting to HTML or CSV formats. A PIN code is available each time you launch the app for privacy. The interface and app design is simply great and on par with iBear and their Bills for iPad app (this app is also created by iBear). The app does not sync the data between the iPad and the iPhone which is a disappointment. If you want to turn your iPad into your new checkbook this is an app to consider.