# Physics Toolbox Magnetometer vs 试题库

The clearest difference is in-app purchases: 试题库 at none against Physics Toolbox Magnetometer's 1. 试题库 also leads on update cadence (every 3 months vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Physics Toolbox Magnetometer ships an update every 13 months, 试题库 every 3 months. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Physics Toolbox Magnetometer | 试题库 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/physics-toolbox-magnetometer/id1003749103/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 17 MB | 18 MB |
| Requires iOS | 17.1 | **17** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Chrystian Vieyra](https://appshunter.io/developer/998187453) | [中科软股教育科技(北京)股份有限公司](https://appshunter.io/developer/1395665821) |

## 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 |


### 试题库

[App page](https://appshunter.io/ios/app/id1478850740)

**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 试题库 free?

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

### Do Physics Toolbox Magnetometer or 试题库 have ads?

Neither Physics Toolbox Magnetometer nor 试题库 shows ads.

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

Physics Toolbox Magnetometer ships an update every 13 months, and 试题库 every 3 months. Most recently, Physics Toolbox Magnetometer was updated on September 23, 2026 and 试题库 on September 13, 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.*