# Physics Toolbox Magnetometer vs Birdathon

The clearest difference is rating: Physics Toolbox Magnetometer at 5.0 against Birdathon's 4.7. Birdathon's advantage is review sentiment (100% vs 80%) and update cadence (every 4 months vs every 13 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Physics Toolbox Magnetometer sells 1 one-off in-app purchase and Birdathon sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Physics Toolbox Magnetometer holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 7 and 15 respectively. Written reviews complicate that: 80% of Physics Toolbox Magnetometer's written reviews are positive against 100% of Birdathon's, so the app with the better star average is not the one people write more warmly about.

Physics Toolbox Magnetometer ships an update every 13 months, Birdathon every 4 months. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Physics Toolbox Magnetometer | Birdathon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103/reviews)** | [4.7 (15 ratings)](https://appshunter.io/ios/app/birdathon/id1211977440/reviews) |
| Number of ratings | 7 | **15** |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 17 MB | 192 MB |
| Requires iOS | 17.1 | **16.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chrystian Vieyra](https://appshunter.io/developer/998187453) | [Barry Langdon-Lassagne](https://appshunter.io/developer/730758814) |

## 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 |


### Birdathon

[App page](https://appshunter.io/ios/app/birdathon/id1211977440)

This app helps birdwatchers create and organize detailed checklists of their observations. It automatically records time and location, allowing for easy editing and customization. Users can visualize their sightings on maps, add field notes, and export data for sharing or further analysis.

**Highlights:** Observation-centric checklists, Automatic time and location recording, Customizable maps with boundary overlays, Field notes for additional observations, Multiple checklist sorting options, Data export to CSV and other formats, Create checklist templates

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Good Tip | $0.99 | one-time |
| Great Tip | $1.99 | one-time |
| Amazing Tip | $2.99 | one-time |
| Incredible Tip | $4.99 | one-time |


## Frequently asked questions

### Is Physics Toolbox Magnetometer free?

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

### Is Birdathon free?

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

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

Physics Toolbox Magnetometer is rated higher. Physics Toolbox Magnetometer averages 5.0 out of 5 from 7 ratings, while Birdathon averages 4.7 from 15 ratings.

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

Neither Physics Toolbox Magnetometer nor Birdathon shows ads.

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

Physics Toolbox Magnetometer ships an update every 13 months, and Birdathon every 4 months. Most recently, Physics Toolbox Magnetometer was updated on September 23, 2026 and Birdathon on September 19, 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.*