# Simple Circuit Builder vs mssh

The clearest difference is in-app purchases: Simple Circuit Builder at none against mssh's 3. Simple Circuit Builder also leads on iOS requirement (14.0 vs 18.0). mssh's advantage is update cadence (every 9 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. mssh sells 3 one-off in-app purchases. Simple Circuit Builder asks for nothing beyond the download.

Simple Circuit Builder ships an update every 3 weeks, mssh every 9 days. The most recent releases landed on June 4, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Simple Circuit Builder | mssh |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (28 ratings)](https://appshunter.io/ios/app/simple-circuit-builder/id1294616098/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 52.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 14 MB | 10 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David White](https://appshunter.io/developer/911163945) | [Jadesada Ponyium](https://appshunter.io/developer/1793593080) |

## What reviewers say

### Simple Circuit Builder

[App page](https://appshunter.io/ios/app/simple-circuit-builder/id1294616098)

This virtual lab offers a hands-on experience for learning about resistors and circuit resistance. Easily build and test series and parallel circuits, measure voltage and current, and understand the impact of component changes in real-time.

**Highlights:** Build circuits with up to eight components, Five component types, Virtual volt and amp meters, Adjustable resistor and voltage values, Real-time circuit analysis, Demonstrates 'Opens' and 'Shorts'

**Features:** macOS Compatibility

**In-app purchases:** none


### mssh

[App page](https://appshunter.io/ios/app/mssh/id6761432176)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Tip | $0.99 | one-time |
| Lunch Tip | $4.99 | one-time |
| Dinner Tip | $9.99 | one-time |


## Frequently asked questions

### Is Simple Circuit Builder free?

Simple Circuit Builder is free to download, with no in-app purchases.

### Is mssh free?

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

### Do Simple Circuit Builder or mssh have ads?

Neither Simple Circuit Builder nor mssh shows ads.

### Which is updated more often, Simple Circuit Builder or mssh?

Simple Circuit Builder ships an update every 3 weeks, and mssh every 9 days. Most recently, Simple Circuit Builder was updated on June 4, 2026 and mssh 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.*