It's hard to keep track of flimsy paper receipts when traveling, and it's even more crucial when they're for expense reports. And, Expensify is the answer to this predicament. Created by Expensify, this free Android and iOS app aids in tracking and categorizing expenses. Snapping a picture with a smartphone's camera easily inputs receipts. Expenses can be imported from a bank and credit card for an IRS approved e-Receipt. Great for managing expense reports on the go, Expensify will log all expenses and track them by type, vendor and time.