I'm no expert and I've only really glanced at that, but doesn't look like it shows a colourblind person what colours look like to others, it just changes the colours of something to different colours that stand out better against each other.

For that matter, unless someone either goes from normal to colourblind, or colourblind to not, is it actually possible to ever do this? Assuming the transformation isn't possible... how do you describe "red" to someone who can't see "red"? Even if you find the exact colour that, for a colourblind person looks like "red", how do you know you've found it, how does the colourblind person know?

Speaking with Dan, he's indicated that a research organization is making heavy use of his app. Evidently they are close to trials on gene therapy.