This looks really nice as a sketch tool for getting those initial layout ideas in browser quickly.<p>Off the top of my head....<p>How much more complex do you envisage it becoming? Not that I think it actually needs much more, if anything, to be a useful tool.<p>Any thoughts on it becoming aware of existing frameworks like bootstrap or foundation?<p>Does it save each 'page' as an individual file or save multiple 'pages' as a 'project'? I see a tab bar in the demo video so I'm guessing multi page projects.<p>What sort of price are you thinking? Seeing the demo video I think I'd pay $10-$15 without blinking, but this is just a first reaction rough feeling estimate, it might change with more info / a bit of a play.