# EMF Hunter vs Sensor Technology Engineering

The clearest difference is ads: Sensor Technology Engineering at none against EMF Hunter's shown. Sensor Technology Engineering also leads on update cadence (every 7 months vs every 22 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

EMF Hunter ships an update every 22 months, Sensor Technology Engineering every 7 months. The most recent releases landed on September 10, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | EMF Hunter | Sensor Technology Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (10 ratings)](https://appshunter.io/ios/app/emf-hunter/id527767947/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 22 months | **Every 7 months** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 94 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Derek Hoffmeister](https://appshunter.io/developer/496135095) | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) |

## What reviewers say

### EMF Hunter

[App page](https://appshunter.io/ios/app/emf-hunter/id527767947)

Transform your phone into an electromagnetic field detector. It uses your device's internal compass to measure magnetic and electric fluctuations, displaying readings through meters, graphs, and particle effects. Ideal for educational or entertainment purposes.

**Highlights:** Detects magnetic field strength in three dimensions, Easy-to-read meter with LED indicators, Multiple graph views (line, bar, polar, pie), Particle mode visualizes magnetic force, Start and pause detection functionality, Displays force in microteslas

**In-app purchases:** none


### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


## Frequently asked questions

### Is EMF Hunter free?

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

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Do EMF Hunter or Sensor Technology Engineering have ads?

EMF Hunter shows ads; Sensor Technology Engineering does not.

### Which is updated more often, EMF Hunter or Sensor Technology Engineering?

EMF Hunter ships an update every 22 months, and Sensor Technology Engineering every 7 months. Most recently, EMF Hunter was updated on September 10, 2026 and Sensor Technology Engineering on September 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*