# STEP Viewer — Fast STEP File Viewer

> Fast STEP File Viewer (iPhone/iPad app by Smart Cube Labs Co., Ltd..)

- Source: https://appshunter.io/ios/app/step-viewer/id6756539299 (this page in markdown: same URL + `.md`)
- Developer: [Smart Cube Labs Co., Ltd.](https://appshunter.io/developer/1456342688)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 56 MB
- Languages: English
- Released: 2025-12-23
- Data updated: 2026-07-16
- User reviews in markdown: https://appshunter.io/ios/app/step-viewer/id6756539299/reviews.md

## What is STEP Viewer?

STEP Viewer is a app that lets you view STEP (.stp, .step) CAD files in 3D on your iphone.

◆ Key Features
• Convert STEP/STP files to GLB format for 3D rendering
• Touch to zoom, rotate, and pan
• 6-face view change (Front, Right, Back, Left, Top, Bottom)
• Auto-rotation (pauses on touch, resumes after 3 seconds)
• Converted GLB files saved automatically (Download folder)

◆ Supported Formats
• Input: .stp, .step (STEP AP203, AP214)
• Output: .glb (GL Transmission Format Binary)

◆ How to Use
1. Launch the app and tap the folder icon
2. Select a STEP file
3. View the 3D model after conversion
4. Touch to rotate, pinch to zoom

◆ License
This app uses Open CASCADE Technology (LGPL-2.1) library.
https://www.opencascade.com

For inquiries or bug reports, please contact us via email.


## Version history (last 3 releases)

### 1.02 — 2026-01-02

- Fixed touch control issue after closing Ad-Free Credits dialog on iOS
- Increased maximum ad-free credits from 10 to 100

### 1.01 — 2025-12-31

- 광고미표시 크레딧 기능 추가
- 보상형 광고 시청으로 광고 스킵 가능

### 1.0 — 2025-12-24

No release notes.

## More apps by Smart Cube Labs Co., Ltd.

- [eX-Mars](https://appshunter.io/ios/app/ex-mars/id1512767753)
- [eX-Mars Connect](https://appshunter.io/ios/app/ex-mars-connect/id6451303338)
- [GLB File Viewer](https://appshunter.io/ios/app/glb-file-viewer/id6756513463)

All apps by Smart Cube Labs Co., Ltd.: https://appshunter.io/developer/1456342688

## Related topics

[step file viewer](https://appshunter.io/ios/topics/step-file-viewer)

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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 2026-07-16.*