Thanks for reaching out to us! Chromebook and Android support isn't scheduled for an upcoming VoodooPad update right now, but I'll pass your request along to my team and we'll see if we can support more platforms in the future.
While select Chromebooks are getting support for Android apps, not all of them will, so any app targeting Chromebooks specifically would have to be a webapp. Also, even though Chromebooks are retaining Chrome App APIs (for now), Google is recommending that developers create 'Progressive Web Apps' instead going forward. VoodooPad is very much a Cocoa/Mac app, so I'm guessing the developers would have to establish a new/separate codebase for a webapp version.
There's one option of possibly open-sourcing the data format of VoodooPad so others could write server/client solutions but that's really up to the nice company that now took over VoodooPad and they need support and especially revenues for maintaining and developing VoodooPad.