PhiStruct
3D Geometry Builder & AR
$14.99 · In‑App Purchases
Build ball-and-strut polyhedra by touch, explore 134 guided models, place them in AR on iPhone and iPad, and export for 3D printing. One-time purchase. Fully offline.
PhiStruct is a touch-first ball-and-strut geometry builder: you don't just
view finished shapes — you construct them.
Tap a connector ball, tap a glowing hole, and place a strut. Keep going until
you've assembled Platonic solids, Archimedean solids, golden-ratio forms, and
more. Struts are never allowed to pass through each other, so every model is
physically buildable on your desk.
On iPhone and iPad, place a finished model on a table in AR. Mac has no
table AR — mouse, trackpad, and menus only.
WHY IT'S DIFFERENT
• Hands-on construction, hole by hole — like a strut kit in your pocket
• Collision-proof builds: if it builds in the app, it builds in real life
• Exact φ (golden ratio) math — zero drift
• Fully offline. No account. No ads. No subscription.
WHAT YOU CAN DO
• Free build — pick color and length, tap holes, invent your own models
• Guided builds — step through 134 curated polyhedra (flat shapes, prisms,
Platonic and Archimedean solids, quasicrystal geometry) with the next hole
highlighted, or complete instantly
• Reference ghost — a translucent target to build alongside freehand
• Parts list — color × length × count for sorting or buying real struts
• Export PNG, full-color GLB (Blender / AR / web), or centered STL for 3D
printing
• Save and reopen exact project files, including .vZome from desktop vZome
WHO IT'S FOR
• Makers and 3D-printing hobbyists who want to verify a build before printing
• Math teachers preparing a polyhedra lesson — walk through it step by step
• Geometry lovers who want to make something, not just look at it
One-time purchase. Your projects stay on your device unless you export them.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Your purchase keeps export. New installs can build every model, then unlock STL, GLB, vZome, clean images, and project files once.
The developer, 箫 王, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 箫 王
- Size
- 6.6 MB
- Category
- Education
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 15 more
- English, Arabic, Danish, Dutch, Finnish, French, German, Hebrew, Italian, Japanese, Korean, Norwegian Bokmål, Portuguese, Spanish, Swedish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- PhiStruct Complete $14.99
- Copyright
- © 2026 王箫 (Xiao Wang)
