# RotoSmart Pic vs Quick STL Viewer

The clearest difference is in-app purchases: RotoSmart Pic at none against Quick STL Viewer's 3. RotoSmart Pic also leads on iOS requirement (11.0 vs 17.0). Quick STL Viewer's advantage is update cadence (every 6 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Quick STL Viewer sells 3 in-app purchases, starting at $2.99 per 7 days. RotoSmart Pic asks for nothing beyond the download.

RotoSmart Pic ships an update every 3 months, Quick STL Viewer every 6 days. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | RotoSmart Pic | Quick STL Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (13 ratings)](https://appshunter.io/ios/app/quick-stl-viewer/id6761406893/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 76 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Divyakant Brahmakshatriya](https://appshunter.io/developer/1549872471) | [KEAT MEN TANG](https://appshunter.io/developer/1886302384) |

## What reviewers say

### RotoSmart Pic

[App page](https://appshunter.io/ios/app/rotosmart-pic/id1549872469)

**Features:** macOS Compatibility

**In-app purchases:** none


### Quick STL Viewer

[App page](https://appshunter.io/ios/app/quick-stl-viewer/id6761406893)

Easily open and preview 3D STL files in a smooth, responsive environment. Inspect models with rotation, zoom, and wireframe modes. Customize colors for better visibility without needing an account.

**Highlights:** Instant STL file opening, Smooth 3D model exploration, Rotate and zoom functionality, Wireframe mode for mesh inspection, Customizable object and background colors, No account required

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan Weekly | $2.99 | per 7 days |
| Pro Plan Yearly | $24.99 | per year |
| Quick STL Viewer Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is RotoSmart Pic free?

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

### Is Quick STL Viewer free?

Quick STL Viewer is free to download, with in-app purchases available.

### Do RotoSmart Pic or Quick STL Viewer have ads?

Neither RotoSmart Pic nor Quick STL Viewer shows ads.

### Which is updated more often, RotoSmart Pic or Quick STL Viewer?

RotoSmart Pic ships an update every 3 months, and Quick STL Viewer every 6 days. Most recently, RotoSmart Pic was updated on November 11, 2026 and Quick STL Viewer on November 9, 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.*