Save your money...

This app is a joke. Okay, it is cheap, but still.
The app is a non-sizeable (!) window containing about a dozen (web)pages ("Chapters") explaining various aspects of Objective C.
The "chapters" are:
- Installing XCode (seriously? If you could download this "app" from the Appstore, you should be able to download Xcode as well or you should focus your skills one something like gardening instead of programming.)
- Getting Started (Creating a Hello World application using an Xcode wizard)
- Variables
- If-Else statements
- Objects
- Methods
- Managing multiple objects (basically a short into on NSMutableDictionary
- NSString comparisons (how to compare two NSStrings…)
- Loops (while and for-loops)
- Arrays (another short intro on NSMutableArray)
- Building your First iPad App (a very simple iPad App mostly generated by the Xcode wizard)
- Another iPad example (a very simple Dialog-Application: Calculate an area from the radius)
- Going further (a single sentence expressing the authors hope that the reader had fun)

Obviously it is intended for an audience which has zero experience in programming, because e.g. the "Chapter" Variables explains what a variable is, what a type is, etc. The same goes for the if-else "Chapter". If you know C/C++/C#, half the "chapters" are useless for you.
The objects and methods chapter is actually slightly interesting, but does not go into detail at all, at least the concepts will be familiar to you. For a beginner, the treatment of an object is by far too superficial.
Similarly the iPad chapter is interesting for introducing the concepts of outlets and actions, but it too is just a simple example without much explanation.

Overall it looks like this "booklet" was written in an afternoon, and the bottomline is: spend your money on something else, it will be better spent.

Oliver99 about Beginning Objective C Programming, v2