# Simple Harmonic Motion Calc vs CircuitShepherd

The clearest difference is price: CircuitShepherd at Free against Simple Harmonic Motion Calc's $2.99. CircuitShepherd also leads on update cadence (every 3 weeks vs every 28 months) and iOS requirement (14.0 vs 17.6). Simple Harmonic Motion Calc's advantage is rating (5.0 vs 1.5) and in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

CircuitShepherd is free to download; Simple Harmonic Motion Calc costs $2.99 up front. CircuitShepherd sells 1 in-app purchase, starting at $6.99 per month. Simple Harmonic Motion Calc asks for nothing beyond the download.

Simple Harmonic Motion Calc holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Simple Harmonic Motion Calc ships an update every 28 months, CircuitShepherd every 3 weeks. The most recent releases landed on September 24, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Simple Harmonic Motion Calc | CircuitShepherd |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/simple-harmonic-motion-calc/id1406677354/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/circuitshepherd/id1598606653/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 49 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Josef Woess](https://appshunter.io/developer/1597520399) |

## What reviewers say

### Simple Harmonic Motion Calc

[App page](https://appshunter.io/ios/app/simple-harmonic-motion-calc/id1406677354)

This physics calculator quickly computes various parameters of simple harmonic motion, including amplitude, frequency, displacement, velocity, and acceleration. It supports high precision calculations and offers unit flexibility, making it a handy tool for students and professionals.

**Highlights:** Instant calculation of motion parameters, Copyable results, Included reference formulas, Supports 16 decimal places, Multiple unit support, Ad-free and private

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

**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 Simple Harmonic Motion Calc free?

Simple Harmonic Motion Calc costs $2.99, with no in-app purchases.

### Is CircuitShepherd free?

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

### Which has better reviews, Simple Harmonic Motion Calc or CircuitShepherd?

Simple Harmonic Motion Calc is rated higher. Simple Harmonic Motion Calc averages 5.0 out of 5 from 2 ratings, while CircuitShepherd averages 1.5 from 2 ratings.

### Do Simple Harmonic Motion Calc or CircuitShepherd have ads?

Neither Simple Harmonic Motion Calc nor CircuitShepherd shows ads.

### Which is updated more often, Simple Harmonic Motion Calc or CircuitShepherd?

Simple Harmonic Motion Calc ships an update every 28 months, and CircuitShepherd every 3 weeks. Most recently, Simple Harmonic Motion Calc was updated on September 24, 2026 and CircuitShepherd on October 2, 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.*