Hi, I’m Michal.
Under the name xfanta I model for 3D printing, and since 2018 I’ve published 280 3D models on Printables, all designed in Onshape and then printed on Prusa 3D printers. I also build websites and apps, and most of it started as something I needed myself: a quick look at a STEP file without opening a CAD package, a box for printer parts, a hinge you can’t see.
What every xfanta app promises
Native, not wrapped
SwiftUI, AppKit and Metal. Apps that start instantly and feel at home on the Mac.
Your files stay yours
No accounts, no tracking, no telemetry. Files never leave your device.
Pay once, keep it
No subscriptions. Buy an app once and it is yours, updates included.
From scratch where it matters
Preview3D reads STEP with StepKit, a B-rep kernel written in pure Swift.
Nine languages
English, Czech, German, Spanish, French, Italian, Japanese, Korean and Chinese.
Built in the open
Public feedback boards and every release note published.
So far
- November 2018Among the first models on PrintablesA GoPro knob, snowflake earrings and a lens filter wrench.
- January 2022Wooden railway60 pieces and counting.
- July 2022Manual Gear Shift FidgetThe most printed of my models: 250+ makes.
- 2022–2023SBox system15 boxes for printer parts.
- September 2026Preview3D, PreviewMD, PreviewSVG, Extent and DefragmentFive apps on the App Store.
- NextPainter3DComing to the App Store.
Say hello
Questions, bug reports, ideas for the next app or model — write any time.