# RK Link vs Guardhat

RK Link and Guardhat are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for RK Link against 5.0 for Guardhat. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RK Link ships an update every 4 months, Guardhat every 2 months. The most recent releases landed on September 14, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | RK Link | Guardhat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rk-link/id1422964820/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/guardhat/id1615000582/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 16 MB | 33 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [理研計器株式会社](https://appshunter.io/developer/1422964819) | [Guardhat Inc.](https://appshunter.io/developer/1615000584) |

## What reviewers say

### RK Link

[App page](https://appshunter.io/ios/app/rk-link/id1422964820)

Connect a portable gas monitor to your smartphone via Bluetooth to receive real-time alerts for gas, man-down, and panic alarms. Automatically send emergency emails with location data to up to 100 registered destinations. View gas concentrations and adjust device settings remotely.

**Highlights:** Real-time alarm alerts (gas, man-down, panic), Automatic emergency email notifications, GPS location data in alerts, Gas concentration display, Remote device setting changes, Up to 100 email destinations

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

**In-app purchases:** none


### Guardhat

[App page](https://appshunter.io/ios/app/guardhat/id1615000582)

This app transforms your phone into a safety and collaboration tool for industrial environments. It offers features like SOS alerts, fall detection, and secure communication to enhance worker safety and efficiency.

**Highlights:** SOS and worker-down alerts, Fall detection, Proximity and geofence violation alerts, Audio-visual calling and PTT, Lone worker check-ins, Gas detection monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RK Link free?

RK Link is free to download, with no in-app purchases.

### Is Guardhat free?

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

### Which has better reviews, RK Link or Guardhat?

RK Link and Guardhat are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do RK Link or Guardhat have ads?

Neither RK Link nor Guardhat shows ads.

### Which is updated more often, RK Link or Guardhat?

RK Link ships an update every 4 months, and Guardhat every 2 months. Most recently, RK Link was updated on September 14, 2026 and Guardhat on September 11, 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.*