Regarding the 3D sketching I meant 3D curves.
In what concerns the surface modeling tools... I'm a product designer and only on very rare occasions I start modeling with solids. 99% of the time I create a surface patch layout, whose base is a wireframe layout, and stitch everything in the end and only then I turn the geometry into a solid either by shelling or by closing.
I have more than 20 years of experience with surface and solid modeling but, believe it or not, I'm not a Rhino user.
There are other modelers on the sea Currently I'm a Fusion 360º user. I love that software and will continue to use it but, I would love to have a true native 3D modeler app that I could use on my iPad Pro.