eta (η) is a letter from the Greek alphabet. Under technicians η is the symbol for efficiency. Generally speaking, the ratio between the benefits and the associated costs.

etaCAD provides powerful add-ins for the CAD software Autodesk Inventor.

With these tools daily operation should be facilitated and accelerated.
You need less time for the design and thus increase your efficiency.


A toolbar for quick and easy showing and hiding work features like work planes, axes, points, sketches and BOM references. You don’t need to find them in the browser. More...
Replace assembly components easily with content from the clipboard. More...
Inventor Customizing
Some examples of custom related projects.