# EMF Detector vs MathAlarm

The clearest difference is review sentiment: MathAlarm at 100% against EMF Detector's 25%. MathAlarm also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 3). EMF Detector's advantage is price (Free vs $0.99) and ratings volume (339 vs 2). On update cadence, ads and device support there is nothing between them.

EMF Detector is free to download; MathAlarm costs $0.99 up front. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. MathAlarm asks for nothing beyond the download.

MathAlarm holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: EMF Detector has 339 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of EMF Detector's written reviews are positive against 100% of MathAlarm's.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | EMF Detector | MathAlarm |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.4 (339 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mathalarm-wake-to-solve/id6787743298/reviews)** |
| Number of ratings | **339** | 2 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 11 MB | 2 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [新雨 李](https://appshunter.io/developer/1559932632) | [Discipline Labs LLC](https://appshunter.io/developer/6787710446) |

## What reviewers say

### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713)

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

**Highlights:** EMF monitoring, Electromagnetic field detection, Radiation level measurement, Environmental safety assessment, Real-time EMF readings

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| unlimited features | $4.99 | per month |
| unlimited features | $14.99 | one-time |


### MathAlarm

[App page](https://appshunter.io/ios/app/mathalarm-wake-to-solve/id6787743298)

This alarm app requires users to solve math problems to turn it off, ensuring they are fully awake. It offers customizable settings for repeat schedules, difficulty levels, and alert types, all managed directly on your wrist.

**Highlights:** Solve math problems to stop alarm, Customizable repeat schedules, Four difficulty levels, Haptic or Sound + Vibrate alerts, Multiple independent alarms, Runs entirely on Apple Watch, No iPhone required

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is EMF Detector free?

EMF Detector is free to download, with in-app purchases available.

### Is MathAlarm free?

MathAlarm costs $0.99, with no in-app purchases.

### Which has better reviews, EMF Detector or MathAlarm?

MathAlarm is rated higher. EMF Detector averages 4.4 out of 5 from 339 ratings, while MathAlarm averages 5.0 from 2 ratings.

### Do EMF Detector or MathAlarm have ads?

Neither EMF Detector nor MathAlarm shows ads.

### Which is updated more often, EMF Detector or MathAlarm?

EMF Detector ships an update every 2 weeks, and MathAlarm every 2 weeks. Most recently, EMF Detector was updated on October 24, 2026 and MathAlarm on October 25, 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.*