I've tried this for a few weeks and have to say - great job!
Being self-employed I need to easily track expenses and work out where I can claim back VAT at the end of the year.
This app does that well, and the phone app that goes with it also works great.
Being able to export all items as a single PDF is also handy, since my accountant prefers PDFs. It adds in helpful things like the tax due, as well as categorizations for each.
Recommended.