# Electromagnetic Detector PRO vs KeeHolder

The clearest difference is price: KeeHolder at Free against Electromagnetic Detector PRO's $4.99. KeeHolder also leads on update cadence (daily vs every 14 months). Electromagnetic Detector PRO's advantage is in-app purchases (none vs 1) and iOS requirement (11.2 vs 17.6). On ads and device support there is nothing between them.

KeeHolder is free to download; Electromagnetic Detector PRO costs $4.99 up front. KeeHolder sells 1 one-off in-app purchase. Electromagnetic Detector PRO asks for nothing beyond the download.

Electromagnetic Detector PRO ships an update every 14 months, KeeHolder daily. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Electromagnetic Detector PRO | KeeHolder |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.3 (12 ratings)](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Daily** |
| Monetization | Paid | — |
| Size | 55 MB | 3 MB |
| Requires iOS | **11.2** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [Prashanth Gujjeti](https://appshunter.io/developer/1891188894) |

## What reviewers say

### Electromagnetic Detector PRO

[App page](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533)

Transform your device into an electromagnetic field detector to identify high-risk wireless zones and potential sources of radiation. Receive warnings for strong magnetic fields and record measurements with timestamps. Useful for detecting metallic objects behind walls or underground.

**Highlights:** Detect electromagnetic fields (EMF), Warning beep for high radiation, Measure magnetic force on three axes, Record readings with timestamps, Store up to 100 records, Send measures via email

**Features:** macOS Compatibility

**In-app purchases:** none


### KeeHolder

[App page](https://appshunter.io/ios/app/keeholder/id6763173919)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all databases | $1.99 | one-time |


## Frequently asked questions

### Is Electromagnetic Detector PRO free?

Electromagnetic Detector PRO costs $4.99, with no in-app purchases.

### Is KeeHolder free?

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

### Do Electromagnetic Detector PRO or KeeHolder have ads?

Neither Electromagnetic Detector PRO nor KeeHolder shows ads.

### Which is updated more often, Electromagnetic Detector PRO or KeeHolder?

Electromagnetic Detector PRO ships an update every 14 months, and KeeHolder daily. Most recently, Electromagnetic Detector PRO was updated on October 3, 2026 and KeeHolder on October 8, 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.*