# EMF Detector vs Contacts backup `

EMF Detector and Contacts backup ` both sit at 4.6 stars, but that hides the real split: 60% of EMF Detector's written reviews are positive against 0% of Contacts backup `'s. Contacts backup `'s advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. EMF Detector sells 3 in-app purchases, starting at $3.99 per 7 days and Contacts backup ` sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for EMF Detector against 4.7 for Contacts backup `. Both are backed by a comparable volume of ratings — 108 and 53 respectively. Written reviews are what separate them: 60% of EMF Detector's written reviews are positive against 0% of Contacts backup `'s.

EMF Detector ships an update every 2 months, Contacts backup ` every 3 weeks. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | EMF Detector | Contacts backup ` |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (108 ratings)](https://appshunter.io/ios/app/emf-detector-gauss-meter/id6747639722/reviews) | **[4.7 (53 ratings)](https://appshunter.io/ios/app/contacts-backup/id6748363507/reviews)** |
| Number of ratings | **108** | 53 |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 191 MB | 11 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Neuralful Ai ltd](https://appshunter.io/developer/1707749156) | [ENGINES STUDIO LAB](https://appshunter.io/developer/1686902830) |

## What reviewers say

### 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 |


### Contacts backup `

[App page](https://appshunter.io/ios/app/contacts-backup/id6748363507)

Safeguard your address book with this straightforward utility. Easily back up, restore, and transfer contacts in various formats, even offline. Schedule regular backups and organize them by date for peace of mind.

**Highlights:** One-tap contact backup, Restore from previous backups, Export in VCF or CSV, Share backups easily, Smart backup reminders, Organize backups by date, Offline functionality

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full access for 1 week | $0.99 | per 7 days |
| Full access for 1 month | $3.99 | per month |
| Full access for 1 year | $19.99 | per year |
| Lifetime access | $24.99 | one-time |


## Frequently asked questions

### Is EMF Detector free?

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

### Is Contacts backup ` free?

Contacts backup ` is free to download, with in-app purchases available.

### Which has better reviews, EMF Detector or Contacts backup `?

Contacts backup ` is rated higher. EMF Detector averages 4.6 out of 5 from 108 ratings, while Contacts backup ` averages 4.7 from 53 ratings.

### Do EMF Detector or Contacts backup ` have ads?

EMF Detector shows ads; Contacts backup ` does not.

### Which is updated more often, EMF Detector or Contacts backup `?

EMF Detector ships an update every 2 months, and Contacts backup ` every 3 weeks. Most recently, EMF Detector was updated on November 6, 2026 and Contacts backup ` on October 30, 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.*