# STL Simple Viewer vs SmartBMS Utility

STL Simple Viewer and SmartBMS Utility both sit at 4.3 stars, but that hides the real split: 70% of SmartBMS Utility's written reviews are positive against 18% of STL Simple Viewer's. SmartBMS Utility also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is price (Free vs $9.99) and ratings volume (909 vs 12). On rating there is nothing between them.

STL Simple Viewer is free to download; SmartBMS Utility costs $9.99 up front. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. SmartBMS Utility asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.3 for STL Simple Viewer against 4.3 for SmartBMS Utility. That said, the two scores are not equally well evidenced: STL Simple Viewer has 909 ratings behind it against 12, so its average is the more settled of the two. Written reviews are what separate them: 18% of STL Simple Viewer's written reviews are positive against 70% of SmartBMS Utility's.

STL Simple Viewer ships an update every 5 months, SmartBMS Utility every 2 months. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | SmartBMS Utility |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.3 (909 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) | [4.3 (12 ratings)](https://appshunter.io/ios/app/smartbms-utility/id1540178292/reviews) |
| Number of ratings | **909** | 12 |
| Positive reviews | 18.1% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 23 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Kuehner & Gehrke Development UG (haftungsbeschraenkt)](https://appshunter.io/developer/1497310810) |

## What reviewers say

### STL Simple Viewer

[App page](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400)

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

**Highlights:** View ASCII and Binary STL files, Load STL from ZIP, Rotate, pan, and zoom, Orthogonal and Perspective modes, Model info (triangle count, bounding box), Rendering options (faces, edges, transparency), Clipping plane for interiors

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version (1 week plan) | $0.99 | per 7 days |
| Pro version (1 month plan) | $1.99 | per month |
| Remove Ads | $2.99 | one-time |
| Export Pack | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and intuitive viewer
- 👍 Useful viewing options
- 💡 Supports multiple file formats

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🚨 Excessive and intrusive ads
- 🔍 Limited functionality for larger files

**Reported bugs**

- App crashes when opening larger STL files
- Inability to open some file formats
- Ads continue to appear even after paying for ad removal

**Requested features**

- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version


### SmartBMS Utility

[App page](https://appshunter.io/ios/app/smartbms-utility/id1540178292)

Optimize battery management and extend battery life with real-time monitoring and intelligent control. Receive important alerts and ensure data security with local storage. Compatible with JBD and Daly BMS.

**Highlights:** Real-time battery monitoring, Intelligent control for charging/discharging, Battery condition notifications, Local data storage for security, Easy integration with JBD/Daly BMS

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STL Simple Viewer free?

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

### Is SmartBMS Utility free?

SmartBMS Utility costs $9.99, with no in-app purchases.

### Which has better reviews, STL Simple Viewer or SmartBMS Utility?

STL Simple Viewer and SmartBMS Utility are both rated 4.3 out of 5 on the App Store, from 909 and 12 ratings respectively.

### Do STL Simple Viewer or SmartBMS Utility have ads?

STL Simple Viewer shows ads; SmartBMS Utility does not.

### Which is updated more often, STL Simple Viewer or SmartBMS Utility?

STL Simple Viewer ships an update every 5 months, and SmartBMS Utility every 2 months. Most recently, STL Simple Viewer was updated on October 16, 2026 and SmartBMS Utility on October 14, 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.*