I don't know if this should go here or in the accessories forum (or somewhere else), but can someone point me to the best spreadsheet app for the iPhone? I don't mind spending $10 for Numbers if that is the best, but I don't want to spend $9.99and then $5.99 for something else that is better. I don't have a mac, and ideally I would be able to email the spreadsheet and use/modify on PC excel and email back and use/modify on my iPhone 4 (iOS5, not Jailbroken). iCloud and all that good stuff can come later (or not at all). I would probably have some equations, but no macros. File password protection is a nice bonus, but not essential... Thanks!