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I am a professor that runs Western University's Free Appropriate Sustainability Technology (FAST) research Group Research group. I wrote the Open Source Lab: How to Build Your Own Hardware and Reduce Research Costs.
Morphi is a mobile 3D modeling + printing app for all! In Morphi, users of all skill levels can make 3D printable objects on the go using touch, without wifi or a mouse. Download the app for free on the App Store for iPad and iPad mini.