# STEP File Viewer vs Lumen Playground

The clearest difference is in-app purchases: Lumen Playground at none against STEP File Viewer's 10. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. STEP File Viewer sells 10 in-app purchases, starting at $1.99 per 7 days. Lumen Playground asks for nothing beyond the download.

STEP File Viewer ships an update fortnightly, Lumen Playground every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | STEP File Viewer | Lumen Playground |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (7 ratings)](https://appshunter.io/ios/app/step-file-viewer/id6755721056/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 13 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [维 艾](https://appshunter.io/developer/1771300149) | [Santiago Molina Orozco](https://appshunter.io/developer/6802499438) |

## What reviewers say

### STEP File Viewer

[App page](https://appshunter.io/ios/app/step-file-viewer/id6755721056)

View and interact with 3D CAD files like STEP and IGES. Inspect internal geometry, measure dimensions, and export models in various formats. Ideal for engineers, designers, and students needing to visualize complex designs without expensive software.

**Highlights:** 3D model viewing with pan, zoom, and rotate, Solid, shaded, and wireframe display modes, Measure dimensions and features, Section planes for internal geometry inspection, Export models to STL, OBJ, glTF, and more, Supports assembly data and PMI annotations

**Features:** Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Flex | $1.99 | per 7 days |
| Pro Light | $4.99 | per month |
| Pro Infinity | $19.99 | per year |
| Export as PNG | $2.99 | one-time |
| Export as OBJ | $3.99 | one-time |
| Export as STL | $3.99 | one-time |
| IGES/STEP Model Import | $3.99 | one-time |
| Cross Section View | $4.99 | one-time |
| Exploded View | $4.99 | one-time |
| Export all formats | $15.99 | one-time |


### Lumen Playground

[App page](https://appshunter.io/ios/app/lumen-playground/id6805250815)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STEP File Viewer free?

STEP File Viewer is free to download, with in-app purchases available.

### Is Lumen Playground free?

Lumen Playground is free to download, with no in-app purchases.

### Do STEP File Viewer or Lumen Playground have ads?

Neither STEP File Viewer nor Lumen Playground shows ads.

### Which is updated more often, STEP File Viewer or Lumen Playground?

STEP File Viewer ships an update fortnightly, and Lumen Playground every 2 weeks. Most recently, STEP File Viewer was updated on November 5, 2026 and Lumen Playground on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*