# Real EMF Detector vs Calculator.io

The clearest difference is in-app purchases: Calculator.io at none against Real EMF Detector's 4. Real EMF Detector's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Real EMF Detector sells 4 in-app purchases, starting at $1.99 per 7 days. Calculator.io asks for nothing beyond the download.

Real EMF Detector ships an update fortnightly, Calculator.io every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Real EMF Detector | Calculator.io |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Size | 17 MB | 33 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MOBILE ALCHEMY LTD](https://appshunter.io/developer/1577973502) | [ARSIDIAN Limited Liability Company](https://appshunter.io/developer/6793037470) |

## What reviewers say

### Real EMF Detector

[App page](https://appshunter.io/ios/app/real-emf-detector/id6772847396)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EMF Detector Pro | $1.99 | per 7 days |
| EMF Detector Pro | $4.99 | per month |
| EMF Detector Pro | $19.99 | per year |
| EMF Detector Pro – Lifetime | $39.99 | one-time |


### Calculator.io

[App page](https://appshunter.io/ios/app/calculatorio/id6814820777)

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

**In-app purchases:** none


## Frequently asked questions

### Is Real EMF Detector free?

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

### Is Calculator.io free?

Calculator.io is free to download, with no in-app purchases.

### Do Real EMF Detector or Calculator.io have ads?

Calculator.io shows ads; Real EMF Detector does not.

### Which is updated more often, Real EMF Detector or Calculator.io?

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