# LinkComm vs CrowdMag

The clearest difference is review sentiment: LinkComm at 100% against CrowdMag's 53%. LinkComm also leads on rating (4.7 vs 4.3). CrowdMag's advantage is ratings volume (24 vs 3). 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.

LinkComm holds the better App Store score, 4.7 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 LinkComm's written reviews are positive against 53% of CrowdMag's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | LinkComm | CrowdMag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/linkcomm/id590256859/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 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 114 MB | 18 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OTT HydroMet Corp](https://appshunter.io/developer/1785982437) | [University of Colorado Boulder](https://appshunter.io/developer/972210292) |

## What reviewers say

### LinkComm

[App page](https://appshunter.io/ios/app/linkcomm/id590256859)

This application allows users to communicate with specific OTT HydroMet dataloggers and transmitters. It enables viewing current status, downloading logged data, changing device setups, and performing diagnostic actions.

**Highlights:** View current status and measurement data, Change device setup, Download and graph logged data, Perform diagnostics, Supports Satlink3, X-Link, ecoLog 1000, SensorLink 1000

**Features:** Vision Pro support

**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 LinkComm free?

LinkComm 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, LinkComm or CrowdMag?

LinkComm is rated higher. LinkComm averages 4.7 out of 5 from 3 ratings, while CrowdMag averages 4.3 from 24 ratings.

### Do LinkComm or CrowdMag have ads?

Neither LinkComm nor CrowdMag shows ads.

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

LinkComm ships an update every 2 months, and CrowdMag every 2 months. Most recently, LinkComm was updated on September 9, 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.*