I found an excellent business (and personal) expense app for iDevices
It's BizXpens Trkr. It's well worth the initial cost of $5.99 plus in-app addition of syncing (say, to iCloud or Dropbox or between 2 iDevices). :-) It's very easy to use. I combine it with using one of my favorite apps, JotNotPro, to take photos of my receipts and send them directly to my Evernote. (They have custom setting to make receipts or whiteboards look terrific. :-)