I should say that neither Stef nor I has any personal experience of developing for the Apple platforms.
platform: you can make use of our Spiro library if you wish.
If you are wanting to develop a downloadable, free-standing 'App' (not a web-app) - then we can't help you with any information about that - you need to refer to appropriate app development forums. Developing against the Restful
Objects API will be similar to developing against any Http API - just eaiser because the resources and representations are standardised.