Mirror and Other Online Whiteboard Tools

Gene: It's cool when you can collaborate with somebody who sees something like they are invigorated by your work and use that to push it further. Josh: I love listening to you guys talk about sketching in Google Slides and quote unquote zoom sketching. We do a lot of mouse sketching, but with the mirror app, it allows us to sketch with iPad over images and directly in front of clients during team calls. What are your thoughts on apps like mirror and other online whiteboard tools?