Learn TinkerCAD. STL is very easy to get and never fails. My blog: The Best 3D Design Software For Beginners

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3D Scanning - Learn Photogrammetry if you need details and FREE if combined with Meshroom.

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iOS apps read the blog by Andrews Sink he reviewed 4 iOS and android 3D scanning apps just recently. Will cost you some, but in case of AR/VR this may be the best option.

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