According to the folks at VolnaTech, there’s no need to spend time learning how to use complicated tools. Just start development from a template and immediately HTML file available for modification or to launch your app in simulator.
The NimbleKit SDK requires Mac OS X 10.5.5 or higher and iPhone SDK 3.0 or higher. It’s available for US$99. A trial version is full featured but apps created unregistered can run only on iPhone or iPad simulator (part of iPhone SDK).