Phonegap is a framework and can be extended fairly easily to patch in missing functionality. The real limitation is the speed. Everything is slower including

Phonegap is a framework and can be extended fairly easily to patch in missing functionality. The real limitation is the speed. Everything is slower including loading, screen transitions, responses from button presses, etc. If you're making something very simple that won't suffer from being a slower then Phonegap is a great option. If you need performance you should learn Objective C.