There are lots of expenses saas apps out there, but the pain with expenses is scanning in all the receipts. I should be able to do this by just taking a picture of the receipt at the time I get it. Perhaps include some computer vision stuff to pick the numbers off the receipt and let me choose which one was cost (incl./excl. VAT). Include other fields for project, time, date, reason, etc.

Then when I'm finished I click a button and it emails the expenses so I can forward it onto my accounts department.