Your 3D models,
in your pocket
Open any STL file and turn it over in your hand. Read the real dimensions, volume and surface area, and find out whether the mesh is actually watertight before you send it to a printer.
No account, no sign-up. Your models never leave your device.
Built for looking at real parts
Most STL viewers stop at showing you a shape. Pocket 3D also tells you the things you need before printing one.
Real dimensions
Bounding size on every axis, volume, surface area and triangle count — measured in the file's own coordinates, so the axes match your CAD or slicer.
Watertight check
Every edge of a closed mesh is shared by exactly two faces. Pocket 3D checks that, and refuses to show a volume figure when the mesh is open — because on an open surface the number is meaningless.
Standard views
Top, bottom, front, back, left, right and isometric in one tap, plus re-framing. STL is Z-up, so “top” means the top you'd see in your slicer.
Direct manipulation
One finger orbits, pinch zooms, two fingers pan. No modes to switch between — just the model and your hands.
Four shading modes
Flat, smooth, wireframe and x-ray, with six model colours and four backdrops. X-ray fades the near surfaces so you can see interior structure.
Files from anywhere
Binary and ASCII STL, from the file picker, your recents, or shared straight into the app from another app.
Your files stay yours
Pocket 3D has no servers of its own. Your models are read from local storage and rendered on your phone's GPU — they are never uploaded, and the app needs no connection to open or measure one. The app is supported by ads from Google AdMob, which never have access to your files.