The first release of our TabSplit iOS app has just arrived at the itunes app store.
You can view all your past bills, transactions and payments as well as view all debts of your friends. It does not yet support any kind of input unfortunately. But if you are a developer you could solve this problem ;) We have released the full source code for the iOS app on sourceforge: http://sourceforge.net/projects/tabsplit-ios/ – So if you want to help, just drop me a line at email@example.com and i’ll get you up to speed. It is just too much work to develop three platforms in parallel (web, android and iOS) – so we want to focus most of our time on the web and android versions while hoping to find someone to maintain the open source iOS app.
If you want to try out this first version head over to the app store at http://itunes.apple.com/us/app/tabsplit/id481763416