I have recently found what I hope is a diamond in the rough.

Toshl is a fairly simple Android expense tracking app that is currently geared mostly to helping individuals keep track of where their spending goes.

But the user interface for adding transactions and managing spending categories is absolutely wonderful. Very simple, very easy, and still very flexible. Just what you need for entering transaction data with a burger in one hand, a drink in the other, a steering wheel between the knees, and the phone... well, let's just say simple and easy is good.

They don't yet handle multiple currencies, though. However, they have a suggestion site where the multiple currency issue has been suggested as a new feature. They say they're considering it, and may implement it if enough people are interested.

So if you want a good travel expense app on Android, please go to the Toshl comment page and indicate your interest. They currently only have a handful of people interested in the app, so if several FTers show up to support the modifications, we might get what we need.