PhiStruct

Build. Lock. Set it on the table.

Build real geometry with your hands.

Tap a hole, place a strut. If it builds in the app, it builds on your desk. On iPhone and iPad, set it on a real table in AR. Same purchase on Mac — mouse, trackpad, and a resizable window.

  • Collision-proof
  • 134 guided models
  • iPhone, iPad & Mac
  • 12 languages

Download on the App Store

A finished build placed on a real table in AR
Kepler star with the five strut-color picker open

How it works

1

Tap a hole, place a strut

Start from a single ball and build up. Ghost pegs show exactly where the next strut can lock.

2

Guided builds or freehand

Step through 134 curated polyhedra hole-by-hole, or free build against a translucent reference ghost.

3

Place it on a real table

On iPhone and iPad, preview any build in AR at room scale. On every device, export PNG, GLB, STL, or .vZome — plus a parts list.

Kepler star with the five strut-color picker open
Build freely by touch
Model Library on the Hard aisle, Rainbow Core in view
134 guided 3D models
A finished build placed on a real table in AR
Place it on a table in AR
Export sheet for PNG, GLB, STL, and vZome
Export PNG, GLB, STL, vZome
Guided Square Pyramid with the next hole lit
The next hole lights up
Rainbow Core using blue, red, yellow, and green struts
All five strut colors

Also a native Mac app

Mouse, trackpad, and a resizable window. File, Edit, Build, Window, and Help. Drop a .vZome or PhiStruct project onto the window. Same $14.99 purchase. AR stays on iPhone and iPad.

Rainbow Core in the Mac window with blue, red, yellow, and green struts
Free build on Mac
Model library on Mac beside a small stellated dodecahedron
The same 134 models
Guided Square Pyramid on Mac at step 5 of 8
Guided, hole by hole

Watch a guided build

Small stellated dodecahedron — hook, build, export.

Offline, one-time purchase, no account.

No ads, no subscriptions, no tracking. Your projects stay on your device.

Download on the App Store