# System Designer vs CircuitShepherd

The clearest difference is review sentiment: System Designer at 78% against CircuitShepherd's 0%. System Designer also leads on rating (4.4 vs 1.5) and in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CircuitShepherd sells 1 in-app purchase, starting at $6.99 per month. System Designer asks for nothing beyond the download.

System Designer holds the better App Store score, 4.4 against 1.5. That said, the two scores are not equally well evidenced: System Designer has 17 ratings behind it against 2, 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 0% of CircuitShepherd's.

System Designer ships an update monthly, CircuitShepherd every 3 weeks. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | System Designer | CircuitShepherd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/circuitshepherd/id1598606653/reviews) |
| Number of ratings | **17** | 2 |
| Positive reviews | **77.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 49 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erwan Carriou](https://appshunter.io/developer/1102494853) | [Josef Woess](https://appshunter.io/developer/1597520399) |

## 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


### CircuitShepherd

[App page](https://appshunter.io/ios/app/circuitshepherd/id1598606653)

Automate electronic circuit design with AI-driven parameter optimization. Define schematics and design goals, and the software finds optimal part values in real-time. Save time on calculations and iterations with this intuitive tool.

**Highlights:** Automated parameter optimization, AI-driven circuit engineering, Real-time design goal finding, Intuitive user interface, Schematic definition, Part value calculation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| full version | $6.99 | per month |


## Frequently asked questions

### Is System Designer free?

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

### Is CircuitShepherd free?

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

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

System Designer is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while CircuitShepherd averages 1.5 from 2 ratings.

### Do System Designer or CircuitShepherd have ads?

Neither System Designer nor CircuitShepherd shows ads.

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

System Designer ships an update monthly, and CircuitShepherd every 3 weeks. Most recently, System Designer was updated on October 6, 2026 and CircuitShepherd on October 2, 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.*