I’m currently reading “A Dance with Dragons”, and I find myself wanting to look up characters and places a lot, so I went to look for an iPhone application that could help me, but I only found one, “Game of Thrones Companion“, and I didn’t want to pay 24 kr. So, instead, I ended up programming my own application:
I use “A Wiki of Ice and Fire” to fetch the data. All MediaWiki-powered wikis have an API which easily outputs JSON objects for what ever you want. I found a JSON framework for iOS which allowed me to import JSON objects as dictionaries, and then I used a table view, a search bar and a web view to create the app itself. It was actually meant for just personal use, but I might polish it a bit and put it on the app store.