This looks like an interesting app, maybe for toy makers:
www.shapertools.com
From the site:
Shaper Trace is a drawing toolkit that allows you to turn any sketch or drawing into a vector graphic by simply taking a picture. Place the Trace Frame over your sketch and convert it into a Scalable Vector Graphic (SVG) with the Trace App, ready for fabrication using the tool of your choice.

Shaper Trace
Shaper Trace is a drawing toolkit that allows you to turn any sketch or drawing into a vector graphic by simply taking a picture.

From the site:
Shaper Trace is a drawing toolkit that allows you to turn any sketch or drawing into a vector graphic by simply taking a picture. Place the Trace Frame over your sketch and convert it into a Scalable Vector Graphic (SVG) with the Trace App, ready for fabrication using the tool of your choice.