# geoTools vs CrowdMag

The clearest difference is review sentiment: geoTools at 100% against CrowdMag's 53%. geoTools also leads on rating (5.0 vs 4.3) and iOS requirement (8.1 vs 15.0). CrowdMag's advantage is update cadence (every 2 months vs every 29 months) and ratings volume (24 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

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

geoTools holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: CrowdMag has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of geoTools's written reviews are positive against 53% of CrowdMag's.

geoTools ships an update every 29 months, CrowdMag every 2 months. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | geoTools | CrowdMag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/geotools/id591458160/reviews)** | [4.3 (24 ratings)](https://appshunter.io/ios/app/crowdmag/id910578825/reviews) |
| Number of ratings | 3 | **24** |
| Positive reviews | **100.0% of reviews** | 52.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 17 MB | 18 MB |
| Requires iOS | **8.1** | 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

### geoTools

[App page](https://appshunter.io/ios/app/geotools/id591458160)

This app provides tools for geological, geophysical, engineering, and geographic work. It helps estimate geophysical quantities like Bouguer anomaly and magnetic declination, and offers a quick coordinate converter. It's designed for professionals and enthusiasts interested in Earth Sciences.

**Highlights:** Estimate geophysical quantities, Calculate Bouguer anomaly, Estimate magnetic declination, Quick coordinate converter, Geographic to UTM conversion, UTM to geographic conversion, Uses IGRF geomagnetic model

**Features:** macOS Compatibility

**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 geoTools free?

geoTools 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, geoTools or CrowdMag?

geoTools is rated higher. geoTools averages 5.0 out of 5 from 3 ratings, while CrowdMag averages 4.3 from 24 ratings.

### Do geoTools or CrowdMag have ads?

Neither geoTools nor CrowdMag shows ads.

### Which is updated more often, geoTools or CrowdMag?

geoTools ships an update every 29 months, and CrowdMag every 2 months. Most recently, geoTools was updated on September 13, 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.*