Worth the price
There are a plethora of 12-step apps available on the App Store, many of which contain the first few chapters of the big book in full, but this one has a few distinguishing features that make it worth paying for, in my opinion.
First of all, you can annotate the text in this app, including highlighting and adding notes by section. This also contains the personal stories from, if Im not mistaken, all four editions of the big book to date.
My only complaint as of now is that there is no night-reading option (i.e. white text on a black background), but thats certainly not a deal-breaker.
rissabruno about
12 Steps Companion AA Big Book, v2.5.3