I use Evernote. It's a multiplatform app, so you can use it on all your phones and computers. You just use Evernote to take photos or your receipts, etc., and you're done. It has built in OCR, so I don't need to "organize" anything...I can later just do a search for whatever item I'm looking for. If I ever get audited, I can print stuff out if necessary, or search for particular items if necessary. One time when I had a problem with a Reloadit card, it was a snap to send in all the ridiculous documentation they insisted on. I think they were a little shocked that I could email them copies of everything, and they had no choice but to issue me a refund.