# CrowdMag vs Ziqi Tracker Plus

The clearest difference is iOS requirement: Ziqi Tracker Plus at 13.0 against CrowdMag's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CrowdMag ships an update every 2 months, Ziqi Tracker Plus every 6 weeks. The most recent releases landed on October 9, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | CrowdMag | Ziqi Tracker Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (24 ratings)](https://appshunter.io/ios/app/crowdmag/id910578825/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 52.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 18 MB | 87 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [深圳市紫旗科技有限公司](https://appshunter.io/developer/1808138123) |

## What reviewers say

### CrowdMag

[App page](https://appshunter.io/ios/app/crowdmag/id910578825)

This app allows users to measure and contribute to scientific research on Earth's magnetic field using their smartphone. It offers features for recording magnetic data during various activities, including flights, and provides tools for data visualization and analysis.

**Highlights:** Measure magnetic field data, Contribute to scientific research, Record data during flights, Visualize data on maps and graphs, Magnetic calculator with WMM2020, Live magnetic compass, Export data via email/Google Drive

**Features:** macOS Compatibility

**In-app purchases:** none


### Ziqi Tracker Plus

[App page](https://appshunter.io/ios/app/ziqi-tracker-plus/id6749787044)

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

**In-app purchases:** none


## Frequently asked questions

### Is CrowdMag free?

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

### Is Ziqi Tracker Plus free?

Ziqi Tracker Plus is free to download, with no in-app purchases.

### Do CrowdMag or Ziqi Tracker Plus have ads?

Neither CrowdMag nor Ziqi Tracker Plus shows ads.

### Which is updated more often, CrowdMag or Ziqi Tracker Plus?

CrowdMag ships an update every 2 months, and Ziqi Tracker Plus every 6 weeks. Most recently, CrowdMag was updated on October 9, 2026 and Ziqi Tracker Plus on September 7, 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.*