While still busy figuring this app out after having bought it after only a few minutes, it seems very cleverly and expertly done.
That said, the one thing that worries me most as an international user is that it is very hard to figure out if your not perfectly fluent in banking English. There are no language localisations whatsoever.
I had a little issue with Debtinator, and the developer got to it within seconds. The problem was solved within minutes in a small software update. This is crazy. So, big props out to this awesome developer.
I also kind of like its documentation which was nicely written and quite easy to understand. A more detailed walk-through would be an appropriate complement to this application, though.
It's not very expensive, that's true, but it's got lots of power sleeping under the hood. It would be a waste if I should have to leave it sleeping there just because I didn't get all the details.