You might consider at some point in the future (when the backlog of essential work dies down) doing some testing on the impact of displaying the dollar symbol versus the pound symbol in the screenshot of the app. Or better yet based on ip show a screen shot with the currency symbol that is most likely to be applicable.
We're looking at it. I'll probably go for mobile web first - 1 developer and a backlog of essential work that needs to be done. But I hear the call for Android, its definitely on the urgent list.
(edit to respond to edit)
What do you mean "just does splits"? It doesn't (at the moment) do a good job of explaining that the IOUs balance each other out: if I buy you lunch, then you buy me lunch, we're probably pretty close to balanced out.
I'm working with a great designer at the moment to try and fix some of the programmer-isms in the UI.
Like, if I just wanted to say "Joe" owes me $20 for a lawnmower. There isn't a split, it's just an IOU. I think I could put at the top that I 'paid' $20 for the lawnmower (it's my mower! lol) and at the bottom that Joe owes that same $20. And that's basically an IOU.
But it hurts my head to work that logic out, for some reason.