# Physics Toolbox Magnetometer vs Circuitry

The clearest difference is rating: Physics Toolbox Magnetometer at 5.0 against Circuitry's 3.8. Physics Toolbox Magnetometer also leads on review sentiment (80% vs 51%). Circuitry's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 13 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Physics Toolbox Magnetometer sells 1 one-off in-app purchase. Circuitry asks for nothing beyond the download.

Physics Toolbox Magnetometer holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Circuitry has 157 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 80% of Physics Toolbox Magnetometer's written reviews are positive against 51% of Circuitry's.

Physics Toolbox Magnetometer ships an update every 13 months, Circuitry every 4 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Physics Toolbox Magnetometer | Circuitry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103/reviews)** | [3.8 (157 ratings)](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898/reviews) |
| Number of ratings | 9 | **157** |
| Positive reviews | **80.0% of reviews** | 51.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 17 MB | 35 MB |
| Requires iOS | 17.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chrystian Vieyra](https://appshunter.io/developer/998187453) | [Raffael Kaehn](https://appshunter.io/developer/1234032836) |

## What reviewers say

### Physics Toolbox Magnetometer

[App page](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103)

This app transforms your iPhone into a precise scientific instrument for measuring, visualizing, and recording magnetic fields. Explore magnetic field vectors, magnitudes, and compass headings with real-time charts and digital readouts. Ideal for educational experiments, lab work, or curious exploration.

**Highlights:** Real-time magnetic field vector and magnitude display, Chart, digital, and compass viewing modes, Data recording and CSV export, Adjustable sample rate (1-100 Hz), Signal filters for noise reduction, Detection of permanent and electromagnetic fields

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $2.99 | one-time |


### Circuitry

[App page](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898)

Build and simulate electronic circuits in an intuitive 3D environment. This app offers lightning-fast analysis and a user-friendly interface, making complex engineering accessible. Circuits are saved as documents for easy sharing and management across devices.

**Highlights:** 3D circuit building, GPU-accelerated analysis, Intuitive 3D interface, Document-based circuit files, Component placement and connection, Resistor, voltage source, light bulb components

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Cool game idea
- 👍 Nice and 3D interface
- 🚀 Easy to use and perfect 3D
- 👍 Fun and simple
- 👍 Beautifully visual and interactive

**What reviewers complain about**

- 😞 Missing many components
- 😞 Limited functionality
- 😞 Not useful for professional work
- 😞 Inaccurate electrical simulation
- 😞 App is broken/crashes

**Reported bugs**

- App crashes on launch
- App doesn't work after download
- Blank white screen on opening
- App won't open, only shows a folder
- Lights won't turn on

**Requested features**

- Add more components (diodes, transistors, capacitors, inductors, speakers, microphones, resistors, switches, LEDs, displays, transformers)
- Add labels/names for components
- Add intensity and voltage for cables
- Add undo/redo buttons
- Add tutorials or guidance videos


## Frequently asked questions

### Is Physics Toolbox Magnetometer free?

Physics Toolbox Magnetometer is free to download, with in-app purchases available.

### Is Circuitry free?

Circuitry is free to download, with no in-app purchases.

### Which has better reviews, Physics Toolbox Magnetometer or Circuitry?

Physics Toolbox Magnetometer is rated higher. Physics Toolbox Magnetometer averages 5.0 out of 5 from 9 ratings, while Circuitry averages 3.8 from 157 ratings.

### Do Physics Toolbox Magnetometer or Circuitry have ads?

Neither Physics Toolbox Magnetometer nor Circuitry shows ads.

### Which is updated more often, Physics Toolbox Magnetometer or Circuitry?

Physics Toolbox Magnetometer ships an update every 13 months, and Circuitry every 4 months. Most recently, Physics Toolbox Magnetometer was updated on November 6, 2026 and Circuitry on November 6, 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.*