Did anything ever survive that board? I make ArtDeck, reference boards for iPad and Mac, and the ones that killed VizRef are what I want to test against, to find the limits of hardware and my code. I've only pushed it as far as my own boards go! I can give you a TestFlight link if you want.

Late to this but I make ArtDeck, reference boards for iPhone, iPad and Mac. Grayscale, flip, crop, iCloud sync, one-time purchase. Sync speed is Apple's call, though you can force it when it lags, and if PC means Windows there's no version. Free trial in a few weeks! (With the new perspective tool)

The way I've always put it: idea x execution, not idea + execution. Ideas are small relative to execution. The gap between bad and great execution is huge, which is why execution wins. A great idea times bad execution is still nothing, but strong craft can carry something simple very far.