This looks rather neat. It reminds me of a combination of 3ds max’s spline modelling/surface modifer crossed with blenders b-surfaces which, is kinda cool. The thing is, sketching is great an all, but personally I’d want precise control over the curves, so bezier handles. Can this app do that? (I can’t try it out right now).
I’ve been whining on about it for a while now, but I love to see something similar natively in blender but with curves. I.e. create a spline cage with bezier curves, welding the corner points to create quads. Then loop through the cage to find each closed quad, and create a nurbs surface (to allow re-parameterisation) within each, once happy convert to poly/sub-d. I’d love to code it myself, but that’s beyond my skill level.