Google Sheets.

I have been playing around with google sheets and I have found out the you can have a number of sheets on the one sheet and I can make each sheet private to me and someone else.
So I can use this for there progress.

Have a look at my test sheet I have done this with my family.

https://docs.google.com/spreadsheets/d/1fT-eRJbBJIQCNjnhU5RaizYE_eyPC1PkogNe7YYNPQ4/edit#gid=1238740140