# CrowdMag vs PolyProblems

The clearest difference is rating: PolyProblems at 5.0 against CrowdMag's 4.3. PolyProblems also leads on update cadence (fortnightly vs every 2 months). CrowdMag's advantage is ratings volume (24 vs 1). 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.

PolyProblems 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 1, so its average is the more settled of the two.

CrowdMag ships an update every 2 months, PolyProblems fortnightly. The most recent releases landed on September 22, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CrowdMag | PolyProblems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (24 ratings)](https://appshunter.io/ios/app/crowdmag/id910578825/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/polyproblems/id6762303809/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 52.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 18 MB | 36 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [Taylor Labs, LLC](https://appshunter.io/developer/1884219053) |

## 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


### PolyProblems

[App page](https://appshunter.io/ios/app/polyproblems/id6762303809)

This community tool allows students to report physical and social concerns on campus. Users can post photo reports, engage with a real-time feed of issues, and upvote to prioritize problems. It aims to bridge the gap between noticing an issue and getting it resolved, fostering a better campus environment.

**Highlights:** Easy photo reporting of campus issues, Real-time community feed of reports, Upvote system to prioritize problems, Campus-specific utility and social features, Centralized platform for issue resolution

**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 PolyProblems free?

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

### Which has better reviews, CrowdMag or PolyProblems?

PolyProblems is rated higher. CrowdMag averages 4.3 out of 5 from 24 ratings, while PolyProblems averages 5.0 from 1 ratings.

### Do CrowdMag or PolyProblems have ads?

Neither CrowdMag nor PolyProblems shows ads.

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

CrowdMag ships an update every 2 months, and PolyProblems fortnightly. Most recently, CrowdMag was updated on September 22, 2026 and PolyProblems on October 1, 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.*