# iCircuit vs SIMO

The clearest difference is price: SIMO at $4.99 against iCircuit's $12.99. SIMO also leads on in-app purchases (none vs 2) and rating (4.2 vs 3.8). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

iCircuit costs $12.99 and SIMO $4.99 up front. iCircuit sells 2 in-app purchases, starting at $1.99 per month. SIMO asks for nothing beyond the download.

SIMO holds the better App Store score, 4.2 against 3.8. Both are backed by a comparable volume of ratings — 135 and 55 respectively. Written reviews complicate that: 61% of iCircuit's written reviews are positive against 58% of SIMO's, so the app with the better star average is not the one people write more warmly about.

iCircuit ships an update every 4 weeks, SIMO every 3 weeks. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | iCircuit | SIMO |
| --- | --- | --- |
| Price | $12.99 | **$4.99** |
| Rating | [3.8 (135 ratings)](https://appshunter.io/ios/app/icircuit/id383359044/reviews) | **[4.2 (55 ratings)](https://appshunter.io/ios/app/simo-matlab-programming-app/id932694386/reviews)** |
| Number of ratings | **135** | 55 |
| Positive reviews | **61.1% of reviews** | 58.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 179 MB | 61 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Krueger Systems, Inc.](https://appshunter.io/developer/299293363) | [Numerical Co.](https://appshunter.io/developer/1128647431) |

## What reviewers say

### iCircuit

[App page](https://appshunter.io/ios/app/icircuit/id383359044)

Design and simulate analog and digital electronic circuits in real-time. This app offers a comprehensive component library, built-in test equipment, and the ability to create custom elements. It's ideal for learning, prototyping, and validating designs without physical components.

**Highlights:** Real-time circuit simulation, Extensive component library (300+), Built-in test equipment (multimeter, oscilloscope), Programmable Arduino and PIC microcontroller support, Custom element creation and sharing, Audio simulation

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCircuit Pro (Monthly) | $1.99 | per month |
| iCircuit Pro (Yearly) | $14.99 | per year |

**What reviewers like**

- 🚀 Great for learning and testing
- 👍 Intuitive and easy to use
- 💡 Programmable Arduino integration
- 👍 Useful for hobbyists and students

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🔧 Difficult to edit and delete components
- 🔧 Limited component library
- 🔧 Inaccurate simulation results in some cases

**Reported bugs**

- Oscilloscope and meter functions not working properly
- Saving and loading circuits can be unreliable
- Inconsistent behavior when rotating/flipping components
- Crashes when working with larger or more complex circuits

**Requested features**

- More components (e.g. transformers, triodes, MOSFETs)
- Ability to create custom components
- Frequency domain analysis (Bode plots, FFT)
- Improved wiring and component placement controls
- Better support for AC circuits and motors


### SIMO

[App page](https://appshunter.io/ios/app/simo-matlab-programming-app/id932694386)

This app provides a MATLAB development environment for iOS devices, allowing users to create, edit, and run MATLAB code locally. It's designed for beginners and students learning MATLAB basics, offering essential syntax and functions without requiring an internet connection.

**Highlights:** MATLAB interpreter for beginners, Create, edit, and run MATLAB code, 100% on-device computation, Offline functionality, Real-time plot rendering, Command console with syntax highlighting, File manager with iCloud sync

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iCircuit free?

iCircuit costs $12.99, and also offers in-app purchases.

### Is SIMO free?

SIMO costs $4.99, with no in-app purchases.

### Which has better reviews, iCircuit or SIMO?

SIMO is rated higher. iCircuit averages 3.8 out of 5 from 135 ratings, while SIMO averages 4.2 from 55 ratings.

### Do iCircuit or SIMO have ads?

Neither iCircuit nor SIMO shows ads.

### Which is updated more often, iCircuit or SIMO?

iCircuit ships an update every 4 weeks, and SIMO every 3 weeks. Most recently, iCircuit was updated on October 18, 2026 and SIMO on October 17, 2026.

---

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