On our farm; for each of 15 orchards; we need to track the soil moisture & irrigation dates & recommendations between 3 iPhone users who, on occasion, will also review the file on their desktop. I envision a single Excel document with 1 tab for each orchard and perhaps a global tab for global data such as area-wide temperatures. Each tab will have about 50 rows and 20 columns. I would like for the file to reside on iCloud because it is built-in to both the desktops and iPhones. However, this is apparently not straightforward for Excel access. Would it be simpler for my users to add Dropbox or the Microsoft cloud service? Low maintenance is paramount. I suppose in all cases that the file can only be accessed by 1 user at a time - which is fine since this is also simpler than the alternative. Thank u for ur consideration.