There are a few spreadsheet etc apps for the iPhone/ iPad. Office2, documents to go, pages etc etc. most are compatable with excell, word, save as PDF etc etc and can export/import to/from pc or mac through various easy ways. They allow you to edit on the go. Download Dropbox (free) and you can save files etc to it and view/ edit from any pc, mac, iphone ipad etc. These apps take a little bit of time to learn as do most things of this type but after a bit of use they are fairly easy. Most people don't want to put the time in to learn how to use the apps so get too easily frustrated when it doesn't do what they want with one touch. They are only a few £s to get and save loads of time as its much easier to boot up iPhone/ iPad than the pc, quick updating of days work, expenses etc export to Dropbox or save within app and export to pc whenever you have to turn it on. Google spreadsheet apps.