Ring Doorbell 2 vs other wireless option for office front door?

I'm thinking of getting a Ring Video Doorbell 2 for my office front door. It's only my secretary that is working there nowadays, and we only need it for her to see/talk to whomever is there at the front door.

Since she uses a mac computer at her desk, I don't think there's an app or web browser method to connect to the doorbell for the video chat, so I would have to buy her a separate standalone device like a Echo Show 5.

Are there any other cheaper yet reliable wireless options for this kind of setup (must be wireless as per my building manager).

Besides the Echo Show 5, any other cheap tablets etc to use to connect to the doorbell? She doesn't want to use her own cell phone for it. I do have a really old iphone 4 (battery doesn't hold charge anymore, ok when plugged in), and a old Nokia Lumia windows phone (battery ok)