I am not familiar with spreadsheet.com but look at these as possibilities. Zoho Office works on the desktop and online. Free for individuals. (you mentioned it

I am not familiar with spreadsheet.com but look at these as possibilities. Zoho Office works on the desktop and online. Free for individuals. (you mentioned it) https://www.zoho.com/officesuite/ https://www.zoho.com/officesuite/ Apple office apps work online, and collaboratively. You probably don't need an iCloud plus account, just the free one, I think. https://www.icloud.com/numbers/ https://www.icloud.com/numbers/ https://support.apple.com/guide/icloud/numbers-mm000eaf41fd/icloud https://support.apple.com/guide/icloud/numbers-mm000eaf41fd/... They are MS-compatible.