# Circuitry vs Simurelay

The clearest difference is in-app purchases: Circuitry at none against Simurelay's 3. Circuitry also leads on ratings volume (155 vs 17) and iOS requirement (12.0 vs 15.6). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Simurelay sells 3 one-off in-app purchases. Circuitry asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.9 for Circuitry against 3.9 for Simurelay. That said, the two scores are not equally well evidenced: Circuitry has 155 ratings behind it against 17, so its average is the more settled of the two. Written reviews split almost evenly too, at 51% and 52% positive.

Circuitry ships an update every 4 months, Simurelay every 7 months. The most recent releases landed on September 25, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | Circuitry | Simurelay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (155 ratings)](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898/reviews) | [3.9 (17 ratings)](https://appshunter.io/ios/app/simurelay/id1580180864/reviews) |
| Number of ratings | **155** | 17 |
| Positive reviews | 51.4% of reviews | **52.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 35 MB | 19 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Raffael Kaehn](https://appshunter.io/developer/1234032836) | [Abdessamed Benkabouya](https://appshunter.io/developer/1580180866) |

## What reviewers say

### Circuitry

[App page](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898)

Build and simulate electronic circuits in an intuitive 3D environment. This app offers lightning-fast analysis and a user-friendly interface, making complex engineering accessible. Circuits are saved as documents for easy sharing and management across devices.

**Highlights:** 3D circuit building, GPU-accelerated analysis, Intuitive 3D interface, Document-based circuit files, Component placement and connection, Resistor, voltage source, light bulb components

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Cool game idea
- 👍 Nice and 3D interface
- 🚀 Easy to use and perfect 3D
- 👍 Fun and simple
- 👍 Beautifully visual and interactive

**What reviewers complain about**

- 😞 Missing many components
- 😞 Limited functionality
- 😞 Not useful for professional work
- 😞 Inaccurate electrical simulation
- 😞 App is broken/crashes

**Reported bugs**

- App crashes on launch
- App doesn't work after download
- Blank white screen on opening
- App won't open, only shows a folder
- Lights won't turn on

**Requested features**

- Add more components (diodes, transistors, capacitors, inductors, speakers, microphones, resistors, switches, LEDs, displays, transformers)
- Add labels/names for components
- Add intensity and voltage for cables
- Add undo/redo buttons
- Add tutorials or guidance videos


### Simurelay

[App page](https://appshunter.io/ios/app/simurelay/id1580180864)

Design and simulate electromechanical systems with a wide range of basic electrical components. Create detailed electrical diagrams using relays, switches, buttons, contactors, and timers.

**Highlights:** Design electromechanical systems, Simulate electrical diagrams, Basic electrical components library, Relays, switches, buttons, contactors, Timers and motors simulation

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Timers Coils and Contacts | $7.99 | one-time |
| Advanced Tools | $7.99 | one-time |
| Full Version | $14.99 | one-time |


## Frequently asked questions

### Is Circuitry free?

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

### Is Simurelay free?

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

### Which has better reviews, Circuitry or Simurelay?

Circuitry and Simurelay are both rated 3.9 out of 5 on the App Store, from 155 and 17 ratings respectively.

### Do Circuitry or Simurelay have ads?

Neither Circuitry nor Simurelay shows ads.

### Which is updated more often, Circuitry or Simurelay?

Circuitry ships an update every 4 months, and Simurelay every 7 months. Most recently, Circuitry was updated on September 25, 2026 and Simurelay on August 1, 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.*