I'll have to check that one out. Thanks for the link!

Edit: It appears to be for iOS only according to the website [0]. This wouldn't be an issue for my current roommates but I do have some friends on android that I use splitwise with that wouldn't be able to use this. If they ever add Android support I will be sure to check it out.

[0] http://www.splittrapp.com/

Just bought this per your recommendation and I'm excited. My girlfriend and I have just been keeping a bunch of the receipts for shared expenses in an envelope -- this is way better.