Examples
Eleven designs to open, take apart and change. Each opens as your own copy in the app: nothing you change touches the original. They are the models Extrudo's own tests build, so they always work with the current version.
Beginner
Plate with corner holes

The sketch of a plate whose width, depth and hole spacing are parameters, ready to extrude.
Shows: sketch, constraints, dimensions, parameters.
Storage box

An open box cut from a solid, with its walls offset from the outline.
Shows: extrude, cut, sketch on face.
Phone stand

Two bodies combined into one stand.
Shows: extrude, bodies, combine.
Name tag

A key tag with embossed text and rounded corners.
Shows: text, emboss, fillet.
Intermediate
Box with a lid

A box and a lid that fits it, sized by one clearance parameter.
Shows: shell, fillet, chamfer, two bodies.
PCB enclosure

Screw posts, countersunk holes and a lid, patterned and mirrored.
Shows: hole, pattern, mirror, shell.
Wall hook

A hook with a drafted arm and fillets where edges meet.
Shows: draft, fillet.
Knurled knob

A turned knob with a knurl from a circular pattern.
Shows: revolve, circular pattern, chamfer.
Advanced
Threaded bottle cap

A cap and an adapter with modelled threads that fit.
Shows: thread, revolve, shell.
Cable chain link

A swept link patterned into a chain, with a tolerance parameter.
Shows: sweep, pattern, tolerance.
Sweep, loft and coil

One of each: a swept tube, a lofted transition and a spring.
Shows: sweep, loft, coil.