# Physics Toolbox Magnetometer vs SpectralViewer, spectraView

The clearest difference is rating: Physics Toolbox Magnetometer at 5.0 against SpectralViewer, spectraView's 3.8. Physics Toolbox Magnetometer also leads on review sentiment (80% vs 67%). SpectralViewer, spectraView's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 13 months). On price, ratings volume, ads and monetization model there is nothing between them.

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

Physics Toolbox Magnetometer holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 80% of Physics Toolbox Magnetometer's written reviews are positive against 67% of SpectralViewer, spectraView's.

Physics Toolbox Magnetometer ships an update every 13 months, SpectralViewer, spectraView every 3 weeks. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Physics Toolbox Magnetometer | SpectralViewer, spectraView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | **80.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 17 MB | 13 MB |
| Requires iOS | 17.1 | **9.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chrystian Vieyra](https://appshunter.io/developer/998187453) | [Junichi Watanabe](https://appshunter.io/developer/1014493824) |

## 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 |


### SpectralViewer, spectraView

[App page](https://appshunter.io/ios/app/spectralviewer-spectraview/id1201249094)

Utilize your device's camera to capture and analyze spectrum images from a spectrometer. Measure spectral intensity, plot light distribution, and calibrate wavelength scales. Save your spectral data as images.

**Highlights:** Measure spectral intensity with device camera, Analyze spectrum images, Plot light intensity distribution, Calibrate wavelength scales, Save spectral plots as images, Adjust plot scale

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Physics Toolbox Magnetometer free?

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

### Is SpectralViewer, spectraView free?

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

### Which has better reviews, Physics Toolbox Magnetometer or SpectralViewer, spectraView?

Physics Toolbox Magnetometer is rated higher. Physics Toolbox Magnetometer averages 5.0 out of 5 from 7 ratings, while SpectralViewer, spectraView averages 3.8 from 4 ratings.

### Do Physics Toolbox Magnetometer or SpectralViewer, spectraView have ads?

Neither Physics Toolbox Magnetometer nor SpectralViewer, spectraView shows ads.

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

Physics Toolbox Magnetometer ships an update every 13 months, and SpectralViewer, spectraView every 3 weeks. Most recently, Physics Toolbox Magnetometer was updated on October 9, 2026 and SpectralViewer, spectraView on October 12, 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.*