# VoltKeep vs EMF Scan

The clearest difference is ads: VoltKeep at none against EMF Scan's shown. EMF Scan's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. VoltKeep sells 2 in-app purchases, starting at $4.99 per month and EMF Scan sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

VoltKeep ships an update every 3 days, EMF Scan weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | VoltKeep | EMF Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Weekly |
| Size | 74 MB | 29 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuto Furudate](https://appshunter.io/developer/1886072871) | [Yasuhiro Kodama](https://appshunter.io/developer/1895805086) |

## What reviewers say

### VoltKeep

[App page](https://appshunter.io/ios/app/voltkeep-tesla/id6760900723)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $49.99 | per year |


### EMF Scan

[App page](https://appshunter.io/ios/app/emf-scan/id6770155541)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を削除 | $0.99 | one-time |


## Frequently asked questions

### Is VoltKeep free?

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

### Is EMF Scan free?

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

### Do VoltKeep or EMF Scan have ads?

EMF Scan shows ads; VoltKeep does not.

### Which is updated more often, VoltKeep or EMF Scan?

VoltKeep ships an update every 3 days, and EMF Scan weekly. Most recently, VoltKeep was updated on October 31, 2026 and EMF Scan on October 31, 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.*