# CrowdMag vs Survival Protocol X

The clearest difference is price: CrowdMag at Free against Survival Protocol X's $2.99. Survival Protocol X's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

CrowdMag is free to download; Survival Protocol X costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | CrowdMag | Survival Protocol X |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.3 (25 ratings)](https://appshunter.io/ios/app/crowdmag/id910578825/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 52.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | — |
| Size | 18 MB | 94 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [Gurcan GUR](https://appshunter.io/developer/1410081950) |

## 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


### Survival Protocol X

[App page](https://appshunter.io/ios/app/survival-protocol-x/id6778728706)

**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 Survival Protocol X free?

Survival Protocol X costs $2.99, with no in-app purchases.

### Do CrowdMag or Survival Protocol X have ads?

Neither CrowdMag nor Survival Protocol X shows ads.

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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.*