# 3D PDF Reader

> Mobile application for viewing and interacting with 3D PDF data. (iPhone/iPad app by Tech Soft 3D.)

- Source: https://appshunter.io/ios/app/3d-pdf-reader/id569307672 (this page in markdown: same URL + `.md`)
- Developer: [Tech Soft 3D](https://appshunter.io/developer/457991472)
- Category: Productivity
- Price: Free
- Rating: 3.70/5 from 16 App Store ratings · 150 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 121 MB
- Languages: American English
- Released: 2012-10-19
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/3d-pdf-reader/id569307672/reviews.md

## What is 3D PDF Reader?

Experience your rich 3D PDF data without being tied to your desktop! 3D PDF Reader extends the usefulness of 3D PDF documents by making it possible to view and interact with 3D PDF data directly on your tablet or smartphone. 

3D PDF Reader is developed by Tech Soft 3D, the company Adobe® chose as its technology partner for serving Adobe OEM developers using 3D in their applications. This means the same native 3D technology in Adobe Reader® is also in 3D PDF Reader, ensuring that your 3D content displays on mobile devices the same as on desktops with Adobe Reader. 

3D PDF Reader is the only mobile application with 100% format support for the recently ISO-certified PRC format, so you can be sure that 3D content from your standards-compliant 3D PDFs display completely accurately on mobile. 

Support for Views, Product Manufacturing Information (PMI), isolating and hiding parts in an assembly and creating complex section cuts make 3D PDF Reader much more than a viewer. 

Key Features:
• Directly reads PDF files (3D content only)
• Supports .PRC and .U3D (3D PDF) formats
• Also supports .HSF, .STL, and .OBJ .JT, .IGS, .IGES, .STP, .STEP, .IFC, .IFCZIP, .X_B, .X_T, .X_MT, and .XMT_TXT formats
• Calculates physical properties on a per part basis
• Notes any solid geometry as precise (vs. approximate for mesh geometry)
• Uses multiple cutting planes to create complex section cuts for seeing the model’s interior
• Rotates, pans, and zooms using intuitive multi-touch gestures
• Navigates between or animates the transition between various model views
• Queries the part names of objects
• Isolates or hides components of an assembly
• Selects on PMI to determine associated features
• Loads models into 3D PDF Reader directly from an email attachment or cloud-based storage applications such as Box or Dropbox

## Key features

- Reads PDF files with 3D content
- Supports PRC, U3D, HSF, STL, OBJ, JT, IGS, STP, IFC, X_B, X_T formats
- Calculates physical properties per part
- Creates complex section cuts
- Intuitive multi-touch gestures for navigation
- Isolates or hides assembly components
- Loads models from email or cloud storage

## Recent user reviews (10 of 150)

All indexed reviews: https://appshunter.io/ios/app/3d-pdf-reader/id569307672/reviews.md

### 5/5 — Perfetta

*2025-12-06, version 3.8.1*

Applicazione super utile. Riesce ad aprire file anche molto pesanti e farli girare in maniera super fluida.

### 5/5 — Best STEP viewer

*2025-06-05, version 3.8.1*

Open heavy STP files without problems, can do section views.
It is amazing

### 2/5 — Used to work well

*2025-05-04, version 3.8.1*

...but doesn't anymore. It doesn't open files now and it doesn't integrate with the Files app. It doesn't even fill the screen of some iPads. Needs an update.

### 5/5 — One of best simple app

*2025-03-13, version 3.8.1*

It’s really best app which is useful for 3D pdf viewer  ,simple , and includes all feature , more convenient then pc in many case 
Hope you can release  3d assembly viewer in all possible extensions like .stp , .igs , .stl etc

### 1/5 — Uups - opened files are deleted from original folder….

*2025-02-24, version 3.8.1*

Hi there. The software displays all sources as described, yet as soon as a file is opened, it is DELETED from its original folder - and cannot be found by search again. It is the shown in the „recent“ list of PDF Reader, can also still be opened and used, but there is no possibility so save it from there back to the original folder. That is quite a problem if you open something which is not yet backed up. Where on the MacOS are the „recent“ files stored? Can you provide an update which stops „deleting“ files when opening them? MacOS Sequoia 15.2…

### 1/5 — Eskiden Apple da dosyalara erişim yapabiliyorduk şuan kısıtlanmış

*2025-01-16, version 3.8.1*

İphone önerilerinde çıkmıyor uygulama ve dosyalarımı açamıyorum kötü bir güncelleme olmuş…!!!

### 5/5 — Perfect!!

*2024-06-15, version 3.8.1*

After more than year again updated.

Capable to open
3D pdf
Step files
X.T files.

Awesome app and only one in app store.

### 4/5 — 復活？

*2024-05-08, version 3.8.1*

数年前に見つけてからずっと使っていました。
しかし、一年前ぐらいからiOS端末への配信が止まっていたようで、
新しい端末に入れられなくてもどかしく思ってました。
しかし、久々に調べたら再度配信が始まってました！
他のアプリと違って、正常に開きますし、ややこしい操作もなくてとても便利です。

ただ、なぜ配信が止まってたのか、再度配信されたのは何故なのかは知りたいかもです。

でも、3DPDFをタブレットで開くのには1番便利かも

### 4/5 — Va bien

*2022-10-23, version 3.8.1*

Va bien. No tenemos problema. Lo único es que podría añadir funciones como ocultar piezas. Vendría bien.

### 5/5 — 讚

*2022-09-06, version 3.8.1*

能中文更棒

## Frequently asked questions about 3D PDF Reader

### What does the 3D PDF Reader app do?

The 3D PDF Reader app allows you to view and interact with 3D PDF data directly on your tablet or smartphone. It extends the functionality of 3D PDF documents beyond the desktop, enabling mobile access to rich 3D content.

### What file formats does 3D PDF Reader support?

This app supports a wide range of 3D file formats, including PDF files with 3D content, .PRC, .U3D, .HSF, .STL, .OBJ, .JT, .IGS, .IGES, .STP, .STEP, .IFC, .IFCZIP, .X_B, .X_T, .X_MT, and .XMT_TXT. It offers 100% format support for the ISO-certified PRC format.

### Is 3D PDF Reader free to use?

Yes, the 3D PDF Reader app is available for free. There are no in-app purchases or advertisements mentioned in the provided description.

### How can I load 3D models into the app?

You can load 3D models directly into the 3D PDF Reader from an email attachment. Additionally, it supports loading models from cloud-based storage applications such as Box or Dropbox.

### What are some of the advanced features of 3D PDF Reader?

Beyond basic viewing, the app supports features like isolating and hiding parts in an assembly, creating complex section cuts using multiple cutting planes, and querying part names of objects. It also allows selection on Product Manufacturing Information (PMI) to determine associated features.

## Version history (last 5 releases)

### 3.8.1 — 2018-01-16

This app has been updated by Apple to display the Apple Watch app icon.

Fix crash on smaller form factor iPhones running iOS 11.

### 3.8 — 2018-01-03

Updated to newest Dropbox API.
Updated HOOPS Exchange CAD File reading.
Updated HOOPS Visualize Rendering Engine.
Fixed several highlighting & selection bugs.

### 3.7 — 2017-08-31

Updated rendering & file loading subsystems.
Allow users to enable & disable anti-aliasing.

### 3.6 — 2017-05-18

- Enable anti-aliasing by default to improve text readability
- Fix cases where PDF stream content wasn't being freed
- Updates to rendering engine and file parsing

### 3.5 — 2016-12-23

-Fix issue not being able to connect to dropbox in newer iOS versions.

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## More apps by Tech Soft 3D

- [SpinFire Insight](https://appshunter.io/ios/app/spinfire-insight/id6759960530)

All apps by Tech Soft 3D: https://appshunter.io/developer/457991472

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*