# Magnetic Storms vs CrowdMag

The clearest difference is ads: CrowdMag at none against Magnetic Storms's shown. CrowdMag also leads on update cadence (every 2 months vs every 12 months) and monetization model (free vs free with in-app purchases). Magnetic Storms's advantage is review sentiment (82% vs 53%) and iOS requirement (12.4 vs 15.0). On price, rating, ratings volume 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.

On the App Store both sit at effectively the same score — 4.3 for Magnetic Storms against 4.3 for CrowdMag. Both are backed by a comparable volume of ratings — 19 and 24 respectively. Written reviews are what separate them: 82% of Magnetic Storms's written reviews are positive against 53% of CrowdMag's.

Magnetic Storms ships an update every 12 months, CrowdMag every 2 months. The most recent releases landed on June 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Magnetic Storms | CrowdMag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (19 ratings)](https://appshunter.io/ios/app/magnetic-storms/id575956246/reviews) | [4.3 (24 ratings)](https://appshunter.io/ios/app/crowdmag/id910578825/reviews) |
| Number of ratings | 19 | **24** |
| Positive reviews | **81.5% of reviews** | 52.9% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 37 MB | 18 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andre Molina](https://appshunter.io/developer/503002385) | [University of Colorado Boulder](https://appshunter.io/developer/972210292) |

## What reviewers say

### Magnetic Storms

[App page](https://appshunter.io/ios/app/magnetic-storms/id575956246)

Monitor Earth's magnetic field and solar activity in near real-time. Track Kp and A indices, solar wind speed, solar flares, and proton/electron flux. Predict auroras and magnetic storms.

**Highlights:** Real-time magnetic field monitoring, Solar activity tracking, Kp and A Index data, Solar wind speed, Solar flare detection, Proton and electron flux, Aurora prediction

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Magnetic Storms free?

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

### Is CrowdMag free?

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

### Which has better reviews, Magnetic Storms or CrowdMag?

Magnetic Storms and CrowdMag are both rated 4.3 out of 5 on the App Store, from 19 and 24 ratings respectively.

### Do Magnetic Storms or CrowdMag have ads?

Magnetic Storms shows ads; CrowdMag does not.

### Which is updated more often, Magnetic Storms or CrowdMag?

Magnetic Storms ships an update every 12 months, and CrowdMag every 2 months. Most recently, Magnetic Storms was updated on June 10, 2026 and CrowdMag on September 22, 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.*