First alternative: take photo of receipt using phone's default camera app, e-mail photo to yourself putting tags in subject line, file in "Receipts" folder of

First alternative: take photo of receipt using phone's default camera app, e-mail photo to yourself putting tags in subject line, file in "Receipts" folder of your e-mail app on PC. No need for this or any other app you don't already have, and no risk of exposing your info to third party (any more than you already do with e-mail). Second alternative: throw receipt away and record info in Quicken/Quickbooks/etc. when you get your monthly statement. Assumes you can remember details at that time and that you use credit card for all but insignificant expenses. You could also save receipt just long enough to enter details as above ahead of your statement.