Make same application for IPhone 3G,4G,IPAD

Question

I want to make same application but different of images for IPhone 3G,4G and IPAD. Is there any good tool or api is available. Thanks

Answer 1

All of them support the Base SDK 3.2 (at least) so you can start by building a universal app in XCode. From there, using different NIB files for the different devices is not hard and does not require any external tool

Intro to Universal Apps: http://devimages.apple.com/iphone/resources/introductiontouniversalapps.pdf

Working with different NIB files: Loading the Different Nib Files