# skyguard® SmartKey vs NAC

The clearest difference is in-app purchases: skyguard® SmartKey at none against NAC's 1. NAC's advantage is update cadence (fortnightly vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. NAC sells 1 in-app purchase, starting at $199.00 per year. skyguard® SmartKey asks for nothing beyond the download.

skyguard® SmartKey ships an update every 5 weeks, NAC fortnightly. The most recent releases landed on July 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | skyguard® SmartKey | NAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/skyguard-smartkey/id977092136/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 8 MB | 3 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Auto Securit Zrt.](https://appshunter.io/developer/977092135) | [Neubert Aero Corp](https://appshunter.io/developer/1785752651) |

## What reviewers say

### skyguard® SmartKey

[App page](https://appshunter.io/ios/app/skyguard-smartkey/id977092136)

Enhance your car's security and access convenient features like GPS parking payments, driver identification, and e-vignette purchases. Monitor your vehicle's status remotely and control certain functions. Requires an active skyguard® vehicle protection system subscription.

**Highlights:** GPS-based parking payment, Intelligent driver identification, E-vignette purchase, Vehicle status monitoring, Remote controls, Enhanced car security

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

**In-app purchases:** none


### NAC

[App page](https://appshunter.io/ios/app/nac-dfd-decelerometer/id6478895830)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| U.S. Region | $199.00 | per year |


## Frequently asked questions

### Is skyguard® SmartKey free?

skyguard® SmartKey is free to download, with no in-app purchases.

### Is NAC free?

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

### Do skyguard® SmartKey or NAC have ads?

Neither skyguard® SmartKey nor NAC shows ads.

### Which is updated more often, skyguard® SmartKey or NAC?

skyguard® SmartKey ships an update every 5 weeks, and NAC fortnightly. Most recently, skyguard® SmartKey was updated on July 21, 2026 and NAC on September 14, 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.*