Dapp (‘the app design app’) is an iPhone code generator that lets you design your UI on the phone and then publish the screens to PDF and generate native Objective-C code. It allows you to quickly design the look of your app visually and supports a large range of iOS controls that you can link from screen to screen to simulate user interactions. The generated code then gives you a solid starting point for developing the actual application. A number of tutorials are offered on their site, including one showing off the design of a basic RSS reader.
Other iPhone prototyping apps like Interface, Stencils and Briefs exist, and I’ve covered pen and paper or Keynote based approaches here before, but this is the first that I’ve seen to output actual code.
(via 148Apps.biz)
It appears that Interface now supports export to code as well, and the two apps are identical in price (at least here in Australia).
However, it also seems (not having tried either yet, mind you) that Interface no longer supports the live on-device interactive preview (due to new SDK restrictions from Apple), where Dapp may still support that (legitimately or otherwise).
I’m curious how they compare to each other now that they both support export to code.