# SolidInsight vs STEP Viewer

The clearest difference is in-app purchases: STEP Viewer at none against SolidInsight's 3. STEP Viewer also leads on update cadence (every 5 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SolidInsight sells 3 in-app purchases, starting at $46.99 per year. STEP Viewer asks for nothing beyond the download.

SolidInsight ships an update every 5 weeks, STEP Viewer every 5 days. The most recent releases landed on August 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SolidInsight | STEP Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/solidinsight/id1601944650/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 258 MB | 61 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHANDONG HOTEAM SOFTWARE CO., LTD.](https://appshunter.io/developer/954963043) | [Smart Cube Labs Co., Ltd.](https://appshunter.io/developer/1456342688) |

## What reviewers say

### SolidInsight

[App page](https://appshunter.io/ios/app/solidinsight/id1601944650)

View and collaborate on 2D and 3D CAD files on your mobile device without needing expensive desktop software. Measure designs, access properties, and share feedback instantly.

**Highlights:** Supports major 2D/3D CAD formats, View models and drawings on mobile, Measure design dimensions, Access design properties, Markup and share comments, Isolate/hide components, Browse assembly tree

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Annual Subscription | $46.99 | per year |
| Premium Annual Subscription | $94.99 | per year |
| Unlock features in a design | $0.99 | one-time |


### STEP Viewer

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

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

**In-app purchases:** none


## Frequently asked questions

### Is SolidInsight free?

SolidInsight is free to download, with in-app purchases available.

### Is STEP Viewer free?

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

### Do SolidInsight or STEP Viewer have ads?

Neither SolidInsight nor STEP Viewer shows ads.

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

SolidInsight ships an update every 5 weeks, and STEP Viewer every 5 days. Most recently, SolidInsight was updated on August 15, 2026 and STEP Viewer on September 17, 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.*