You can collaborate with others in real time by sharing a link to your Numbers spreadsheet. Since shared spreadsheets and any changes to them are saved in iCloud, people working in the spreadsheet can see the changes as they’re made.
As the owner of the spreadsheet, you control who has access to it, and what they can do:
Spreadsheet access: You can send a spreadsheet link that anyone can use to open the spreadsheet. Or, you can invite specific people, who must sign in to iCloud with their Apple ID to open the spreadsheet.
Editing permission: You can choose whether others can make changes to the spreadsheet or only view it.
You can change access and permission settings or stop sharing a spreadsheet at any time.
To invite others to collaborate on a spreadsheet, you must be signed in to iCloud and have iCloud Drive turned on.
If you invite only specific people to collaborate on your spreadsheet, they must be signed in to iCloud to view or edit the spreadsheet. If you invite someone using an email address or phone number that isn’t associated with their Apple ID, the person won’t be able to accept the invitation until they add the email address or phone number to their Apple ID. Instructions are provided when they tap or click the link in the invitation.
To view or edit a shared spreadsheet, people you share with need any of the following:
A Mac with macOS Sierra 10.12 or later and Numbers 4.2 or later installed. They must also be signed in to iCloud and have iCloud Drive turned on.
An iOS device with iOS 10 and Numbers 3.2 or later installed. They must also be signed in to iCloud and have iCloud Drive turned on.
A Mac or Windows computer with a supported browser.
Anyone with an Android device, or an iOS device without iOS 10 and Numbers 3.2 or later, can view the spreadsheet but not edit it.
Note: Not all Numbers features are available for a spreadsheet that’s shared. See this Apple Support article for information.