# System Designer vs myTextViewer

The clearest difference is rating: System Designer at 4.4 against myTextViewer's 3.7. System Designer also leads on update cadence (monthly vs every 12 months) and review sentiment (78% vs 54%). myTextViewer's advantage is ratings volume (156 vs 17). On price, ads, in-app purchases and monetization model there is nothing between them.

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

System Designer holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: myTextViewer has 156 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 78% of System Designer's written reviews are positive against 54% of myTextViewer's.

System Designer ships an update monthly, myTextViewer every 12 months. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | System Designer | myTextViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** | [3.7 (156 ratings)](https://appshunter.io/ios/app/mytextviewer/id1272975241/reviews) |
| Number of ratings | 17 | **156** |
| Positive reviews | **77.8% of reviews** | 54.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 12 months |
| Monetization | Free | Free |
| Size | 7 MB | 6 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erwan Carriou](https://appshunter.io/developer/1102494853) | [Yaniv Kalsky](https://appshunter.io/developer/310828189) |

## What reviewers say

### System Designer

[App page](https://appshunter.io/ios/app/system-designer/id1132983280)

Design complex systems using a low-code platform that leverages UML standards. Generate code skeletons and manage components graphically. Run and test your system with dynamic type checking.

**Highlights:** UML-based system modeling, Code skeleton generation, Graphical component creation, MSON format for model definition, Dynamic type checking, Cross-device synchronization via GitHub

**Features:** macOS Compatibility

**In-app purchases:** none


### myTextViewer

[App page](https://appshunter.io/ios/app/mytextviewer/id1272975241)

Instantly open and view any text, code, or log file. This app offers professional syntax highlighting and line numbers, making it ideal for professionals who need to access and read various file formats on the go. It supports numerous common file types and provides customizable viewing themes.

**Highlights:** Open any text, code, or log file, Syntax highlighting for common formats, Line numbers display, Light and dark viewing themes, Share option integration

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

**In-app purchases:** none

**What reviewers like**

- ✅ Opens unsupported file formats reliably
- 📂 Handles multiple file types (XML, JSON, LOG, EML, YML)
- 🎯 Simple and straightforward functionality
- ⚡ No unnecessary features or bloat
- 🆓 Free to use

**What reviewers complain about**

- 🐛 Files display as blank or won't open
- ❌ Inconsistent file compatibility
- 😤 Requires review before using app
- 📱 Compatibility issues with iOS updates
- 🔄 Confusing sharing/import workflow

**Reported bugs**

- App fails to open files from Files app
- JSON files display blank
- XML files not rendering properly
- App crashes or won't launch
- Incompatibility with iOS 14 and iOS 16

**Requested features**

- Search/find function within documents
- File editing capabilities
- Remove ads or ad-free option
- Support for action extensions
- Better file import options


## Frequently asked questions

### Is System Designer free?

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

### Is myTextViewer free?

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

### Which has better reviews, System Designer or myTextViewer?

System Designer is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while myTextViewer averages 3.7 from 156 ratings.

### Do System Designer or myTextViewer have ads?

Neither System Designer nor myTextViewer shows ads.

### Which is updated more often, System Designer or myTextViewer?

System Designer ships an update monthly, and myTextViewer every 12 months. Most recently, System Designer was updated on September 18, 2026 and myTextViewer on September 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.*