I spent about 6 months looking for that - even for a single account. I went back to using my desktop. Most app developers aren't accountants, and don't consult with an accountant (or even a bookkeeper) - and if you don't know the field, you can't write an app to do it. (I kind of know - I've written an accounting package - and had to sit with the CFO of the company for a few months on and off to learn enough about how even simple accounts are handled.)