What app or apps do I need? | Help | Forum

I have a spreadsheet that I update on a daily basis. I have it on both my home computer and work computer. And right now I have to update each pc individually. I want to able to update the spreadsheet on either pc or on my iPhone a then have it update to one or both pc's or iPhone. I believe this is called 2 way syncing but I am not sure…what app or apps do I need to do this? Is it possible?