# RC Circuit vs Simple Circuit Builder

The clearest difference is rating: RC Circuit at 4.8 against Simple Circuit Builder's 4.0. RC Circuit also leads on iOS requirement (12.0 vs 14.0). Simple Circuit Builder's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 6 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. RC Circuit sells 1 one-off in-app purchase. Simple Circuit Builder asks for nothing beyond the download.

RC Circuit holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Simple Circuit Builder has 28 ratings behind it against 5, so its average is the more settled of the two.

RC Circuit ships an update every 6 months, Simple Circuit Builder every 3 weeks. The most recent releases landed on September 24, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | RC Circuit | Simple Circuit Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews)** | [4.0 (28 ratings)](https://appshunter.io/ios/app/simple-circuit-builder/id1294616098/reviews) |
| Number of ratings | 5 | **28** |
| Positive reviews | — | 52.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 14 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [David White](https://appshunter.io/developer/911163945) |

## What reviewers say

### RC Circuit

[App page](https://appshunter.io/ios/app/rc-circuit/id824460716)

Calculate RC charging and filter circuits, including time constants and cutoff frequencies. Find component values from these parameters or get voltage at specific times. Save and share data easily.

**Highlights:** Calculate time constant, Find component values, Get voltage at time t, Calculate cutoff frequency, Save data to CSV, Upload CSV via AirDrop/iCloud Drive, Multi-language support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro features | $0.99 | one-time |


### 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


## Frequently asked questions

### Is RC Circuit free?

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

### Is Simple Circuit Builder free?

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

### Which has better reviews, RC Circuit or Simple Circuit Builder?

RC Circuit is rated higher. RC Circuit averages 4.8 out of 5 from 5 ratings, while Simple Circuit Builder averages 4.0 from 28 ratings.

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

Neither RC Circuit nor Simple Circuit Builder shows ads.

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

RC Circuit ships an update every 6 months, and Simple Circuit Builder every 3 weeks. Most recently, RC Circuit was updated on September 24, 2026 and Simple Circuit Builder on June 4, 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.*