# STEP Viewer vs Stairstep

The clearest difference is rating: Stairstep at 5.0 against STEP Viewer's 1.0. STEP Viewer's advantage is update cadence (every 5 days vs monthly) and iOS requirement (13.0 vs 26.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Stairstep holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

STEP Viewer ships an update every 5 days, Stairstep monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | STEP Viewer | Stairstep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/step-viewer/id6756539299/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stairstep/id6781493653/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | — | Free |
| Size | 61 MB | 23 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Smart Cube Labs Co., Ltd.](https://appshunter.io/developer/1456342688) | [Twarge LLC](https://appshunter.io/developer/6781456673) |

## What reviewers say

### STEP Viewer

[App page](https://appshunter.io/ios/app/step-viewer/id6756539299)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Stairstep

[App page](https://appshunter.io/ios/app/stairstep/id6781493653)

View and inspect 3D models in STEP file format. Explore models with intuitive orbit, pan, and zoom controls, aided by a reference grid and scale bar. Access detailed geometry information including vertices, triangles, and dimensions.

**Highlights:** 3D model viewing, Orbit, pan, and zoom controls, Reference grid, Scale bar for size tracking, Geometry inspector, Dimension reporting

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STEP Viewer free?

STEP Viewer is free to download, with no in-app purchases.

### Is Stairstep free?

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

### Which has better reviews, STEP Viewer or Stairstep?

Stairstep is rated higher. STEP Viewer averages 1.0 out of 5 from 1 ratings, while Stairstep averages 5.0 from 1 ratings.

### Do STEP Viewer or Stairstep have ads?

Neither STEP Viewer nor Stairstep shows ads.

### Which is updated more often, STEP Viewer or Stairstep?

STEP Viewer ships an update every 5 days, and Stairstep monthly. Most recently, STEP Viewer was updated on October 24, 2026 and Stairstep on October 24, 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.*