# RCircuitCalc vs CircuitShepherd

The clearest difference is price: CircuitShepherd at Free against RCircuitCalc's $1.99. CircuitShepherd also leads on rating (1.5 vs 1.0) and update cadence (every 3 weeks vs every 17 months). RCircuitCalc's advantage is in-app purchases (none vs 1). On review sentiment, ratings volume, ads and device support there is nothing between them.

CircuitShepherd is free to download; RCircuitCalc costs $1.99 up front. CircuitShepherd sells 1 in-app purchase, starting at $6.99 per month. RCircuitCalc asks for nothing beyond the download.

CircuitShepherd holds the better App Store score, 1.5 against 1.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

RCircuitCalc ships an update every 17 months, CircuitShepherd every 3 weeks. The most recent releases landed on June 8, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | RCircuitCalc | CircuitShepherd |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [1.0 (5 ratings)](https://appshunter.io/ios/app/rcircuitcalc/id857468508/reviews) | **[1.5 (2 ratings)](https://appshunter.io/ios/app/circuitshepherd/id1598606653/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 7 MB | 49 MB |
| Requires iOS | **13.6** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKAHIKO FUKUYAMA](https://appshunter.io/developer/857468511) | [Josef Woess](https://appshunter.io/developer/1597520399) |

## What reviewers say

### RCircuitCalc

[App page](https://appshunter.io/ios/app/rcircuitcalc/id857468508)

This app helps engineers and students design electrical and electronic circuits by calculating standard resistance values based on E-series numbers. It supports various circuit types, including voltage dividers, series, parallel, and combination circuits, and can also calculate current and power for each resistor.

**Highlights:** Calculates standard resistance values, Supports voltage dividers, series, parallel, and combination circuits, Calculates current and power for resistors, Outputs resistance values based on E-series numbers (E6, E12, E24, E48, E96), Calculations based on input voltage, output voltage, current, and resistance ratio

**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 RCircuitCalc free?

RCircuitCalc costs $1.99, with no in-app purchases.

### Is CircuitShepherd free?

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

### Which has better reviews, RCircuitCalc or CircuitShepherd?

CircuitShepherd is rated higher. RCircuitCalc averages 1.0 out of 5 from 5 ratings, while CircuitShepherd averages 1.5 from 2 ratings.

### Do RCircuitCalc or CircuitShepherd have ads?

Neither RCircuitCalc nor CircuitShepherd shows ads.

### Which is updated more often, RCircuitCalc or CircuitShepherd?

RCircuitCalc ships an update every 17 months, and CircuitShepherd every 3 weeks. Most recently, RCircuitCalc was updated on June 8, 2026 and CircuitShepherd 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.*