Numbers, Sheets and Keynote are all free apps. Office for Mac is not.
Keynote for iOS also serves as a very reliable and easy to set up presentation remote.
Keynote for iOS also serves as a very reliable and easy to set up presentation remote.
If I send a non-Mac-user a Keynote presentation they'll import it to PowerPoint and send me back that, which I have to import, etc.
I find it interesting that web apps are actually better than desktop apps for this stuff. Even five years ago I would have questioned that ever happening.