As any road warrior knows, keeping track of expenses can be a pain. Expensify can ease the burden. The app provides a simple interface for tracking time, miles, receipts, and invoices on the go and generating on-demand reports as needed.
Expensify lets you scan receipts as you get them -- up to 10 a month for free -- and then automatically pulls out the pertinent info from the images and puts it into your records. It can tap into your phone's GPS to log miles as you drive, and it offers offline functionality for the times when you can't get a signal.
Expensify is free, though optional premium plans will lift certain usage restrictions and unlock additional features.