# STL Master vs IIJS

The clearest difference is review sentiment: STL Master at 86% against IIJS's 0%. STL Master also leads on rating (4.2 vs 1.0) and ratings volume (49 vs 1). IIJS's advantage is iOS requirement (12.2 vs 14.1). On price, update cadence, 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.

STL Master holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: STL Master has 49 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of STL Master's written reviews are positive against 0% of IIJS's.

STL Master ships an update monthly, IIJS fortnightly. The most recent releases landed on June 8, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | STL Master | IIJS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (49 ratings)](https://appshunter.io/ios/app/stl-master/id1435885139/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/iijs/id1673758923/reviews) |
| Number of ratings | **49** | 1 |
| Positive reviews | **86.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | Free |
| Size | 68 MB | 67 MB |
| Requires iOS | 14.1 | **12.2** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [JA Logic Labs LLC](https://appshunter.io/developer/1745984849) | [DJ INTERACTIVE SOLUTIONS PRIVATE LIMITED](https://appshunter.io/developer/1626472920) |

## What reviewers say

### STL Master

[App page](https://appshunter.io/ios/app/stl-master/id1435885139)

View and interact with 3D models in augmented reality. Share instant screenshots and screen recordings of your designs directly from the app.

**Highlights:** STL file viewing, Augmented reality (AR) mode, Instant screenshots, Screen recording, Design sharing

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and smooth rendering performance
- 💰 Completely free with no ads or trackers
- 🎨 High-quality rendering and visualization
- 📱 Works well on mobile devices (iPhone, iPad)
- 🌐 AR (Augmented Reality) feature

**What reviewers complain about**

- 🐛 Frequent crashes and freezing
- 🖱️ Difficult object manipulation and navigation
- 🔍 Zoom limitations (hard to zoom out/in)
- ❌ Inconsistent file loading and orientation
- 🎨 Overly shiny/metallic default appearance

**Reported bugs**

- App crashes immediately on launch
- Files won't open or load
- Objects disappear when moved
- Inconsistent file orientation on load
- Markup mode traps user and requires app restart

**Requested features**

- More color and material options
- Unit measurement display and metric/standard conversion
- How-to video tutorials for hidden features
- Proper zoom in/out controls
- Object positioning/movement button


### IIJS

[App page](https://appshunter.io/ios/app/iijs/id1673758923)

Connect with the gem and jewellery industry. Access exhibition information, product trends, exhibitor directories, and city guides. Stay updated on seminars and service updates for business growth.

**Highlights:** Connect with industry professionals, Exhibition information and updates, Product trends and innovations, Exhibitor directory and service updates, City guides and floor plans, QR code scanner for show services

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

**In-app purchases:** none


## Frequently asked questions

### Is STL Master free?

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

### Is IIJS free?

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

### Which has better reviews, STL Master or IIJS?

STL Master is rated higher. STL Master averages 4.2 out of 5 from 49 ratings, while IIJS averages 1.0 from 1 ratings.

### Do STL Master or IIJS have ads?

Neither STL Master nor IIJS shows ads.

### Which is updated more often, STL Master or IIJS?

STL Master ships an update monthly, and IIJS fortnightly. Most recently, STL Master was updated on June 8, 2026 and IIJS on August 19, 2026.

---

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