# Note by Chat & Send Files vs EMF Detector

The clearest difference is in-app purchases: Note by Chat & Send Files at none against EMF Detector's 3. Note by Chat & Send Files also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). EMF Detector's advantage is update cadence (every 2 months vs every 11 months). On price and device support there is nothing between them.

Both are free to download. EMF Detector sells 3 in-app purchases, starting at $3.99 per 7 days. Note by Chat & Send Files asks for nothing beyond the download.

Note by Chat & Send Files ships an update every 11 months, EMF Detector every 2 months. The most recent releases landed on October 28, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Note by Chat & Send Files | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (108 ratings)](https://appshunter.io/ios/app/emf-detector-gauss-meter/id6747639722/reviews)** |
| Number of ratings | — | **108** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 191 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Shotdoor](https://appshunter.io/developer/530049796) | [Neuralful Ai ltd](https://appshunter.io/developer/1707749156) |

## What reviewers say

### Note by Chat & Send Files

[App page](https://appshunter.io/ios/app/note-by-chat-and-send-files/id6740557621)

**Features:** macOS Compatibility

**In-app purchases:** none


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-gauss-meter/id6747639722)

Transform your iPhone into an EMF detector and gauss meter. Measure magnetic fields in real-time, with options for ghost hunting, metal detection, and stud finding. Export your session logs for detailed analysis.

**Highlights:** Live EMF detection with peak hold, Switchable units (µT, mG, Gauss), Zero/calibrate function, Ghost hunt mode with audio/haptics, Metal and stud finder, Session logging with CSV/PDF export

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week | $3.99 | per 7 days |
| yearlypro | $14.99 | per year |
| emfmeter | $29.99 | one-time |


## Frequently asked questions

### Is Note by Chat & Send Files free?

Note by Chat & Send Files is free to download, with no in-app purchases.

### Is EMF Detector free?

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

### Do Note by Chat & Send Files or EMF Detector have ads?

EMF Detector shows ads; Note by Chat & Send Files does not.

### Which is updated more often, Note by Chat & Send Files or EMF Detector?

Note by Chat & Send Files ships an update every 11 months, and EMF Detector every 2 months. Most recently, Note by Chat & Send Files was updated on October 28, 2026 and EMF Detector on November 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.*