Pocket 3D: STL Viewer
View & measure STL models
Free · Designed for iPad. Not verified for macOS.
Open any STL on your phone. Read real dimensions, volume and surface area, and check whether the mesh is watertight before you print it. Files never leave your phone.
Pocket 3D turns your iPhone into a proper STL viewer. Open a model, turn it over in your hand, and find out the things you actually need to know before you print it.
MEASURE YOUR MODEL Bounding size on every axis, plus volume, surface area and triangle count. Everything is measured in the file's own coordinate frame, so the axes match your CAD software or slicer. Sizes are shown in millimetres, the standard convention for 3D printing.
CHECK IF IT WILL PRINT In a closed mesh, every edge is shared by exactly two faces. Pocket 3D verifies that and reports the result. When a mesh is not watertight, the app withholds the volume figure rather than showing one, because on an open surface that number has no meaning.
VIEW FROM ANY ANGLE One finger orbits, pinch zooms, two fingers pan. Snap to isometric, top, bottom, front, back, left or right, and re-frame at any time.
MAKE IT READABLE Six model colours, four backdrops, and four shading modes: flat, smooth, wireframe and x-ray. X-ray fades the near surfaces so interior structure becomes visible.
OPEN FILES FROM ANYWHERE Binary and ASCII STL with automatic format detection. Open from the file picker, your recents, or share a file straight into Pocket 3D from another app. A sample model is bundled so you can try it immediately.
PRIVATE BY DEFAULT No servers, no account, no sign-up. Files are read on your device and never leave it. No analytics, no advertising, no tracking. Works with no internet connection.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Pocket 3D is now free and supported by ads.
WHAT HASN'T CHANGED
Your models are read on your device and never uploaded. The advertising has no access to your files, their contents or their names. Opening, rendering and measuring a model still needs no internet connection — with no connection the app works exactly as before, simply without ads.
PRIVACY CONTROLS
On iOS you're asked before the advertising identifier may be used to track you across other companies' apps. Decline and every feature still works. Where consent rules apply, a Privacy options entry appears in the Info panel so you can change your choice at any time.
ALSO IN THIS RELEASE
- Back now closes an open sheet, then the current model, and asks before leaving the app
- A Rate Pocket 3D link in the Info panel
- The file list scrolls, fixing crowding on smaller screens with a full recents list
- Fixed a glitch where a closed model could flash back on screen for a moment
The developer, Jay Movaliya, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jay Movaliya
- Size
- 42 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Jay Movaliya