[victorlin]

like I mentioned in the article, I found no solution for iPad, so I built one for myself. So I am not really sure what's the solution out there for devices other than iPad.

However, there is smart whiteboard device out there in market, like

Google's Jamboard https://gsuite.google.com/jamboard/

Microsoft's Surface Hub https://www.microsoft.com/microsoft-surface-hub/en-us

They are not cheap thought.

And for the traction, I just started marketing, time is too short, I don't have the data yet.