>I can't imagine an easier way to digitize a receipt

For me, it ends up being sticking them in a wallet/envelope and then scanning then in bulk when I get back. If I had a phone app that integrated with a back-end expenses system, I could probably be persuaded to use it because it would largely eliminate the manual process of creating an expense report. However, as it is, something like Expensify trades a one-time batch operation for a bunch more fiddling at the point of spending.