RKI OPLS vs Guardhat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RKI OPLS
Monitor readings and detector status for RKI's OPLS detector. Adjust operational parameters remotely. Essential for managing environmental monitoring equipment.
- View detector readings
- Check detector status
- Change operation parameters
- Remote monitoring
- Device management
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For RKI’s OPLS detector. View readings and detector status. Change operation parameters
Guardhat
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.
- SOS and worker-down alerts
- Fall detection
- Proximity and geofence violation alerts
- Audio-visual calling and PTT
- Lone worker check-ins
- Gas detection monitoring
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Guardhat technology is built with a single purpose: to solve real-world industrial problems, with a human-centric perspective. The Guardhat iOS app works with the Guardhat Platform and Guardhat Solutions to turn your phone into a cutting-edge tool for work safety and collaboration. The Guardhat app provides core safety functionality including SOS, fall detection, worker-down, proximity detection, geofence violation and evacuation alerts to workers on the frontline as well as their support, engineering and/or emergency response teams anywhere in the world. It also comes with full audio-visual calling, multi-channel, dynamic PTT, and secure media capture and storage – to make hazardous work easier and faster even as it makes work safer. The app is a compatible frontline device for use with the Guardhat Lone Worker solution, which provides additional automated alerts and functionality around check-ins and visibility for those who work alone, distributed, or in remote locations to ensure they get home safe at the end of each shift. Gas detection & analytics features within the Guardhat Worker Condition Monitoring solution are also compatible with the app to track wearable/mobile gas detector status and alerts in real-time to create and manage a connected fleet of smart detectors to prevent exposure events and respond to incidents more swiftly and effectively. The Guardhat App harnesses the full power of sensors and communication capabilities built into the iPhone to provide critical safety and productivity features to frontline workers. For continuous protection, the app requires permission to be granted via iOS settings to use the camera, microphone, location, Bluetooth and local network, even while the app is in the background (i.e. Always On). Ensuring privacy and keeping control in the hands of the user are guiding principles for the Guardhat app. The list of features and required privacy settings (iOS Settings > Privacy) are provided below to help you decide how you would use the app. 1. Lone worker timed check-ins (uses location for emergency response, even while running in the background; “Always On” setting needed for Location) 2. AV Communications (uses local network even while running in the background; “Always On” setting needed for Local Network) 3. Incident management, including nearby worker alerts (uses location for emergency response, even while running in the background; “Always On” setting needed for Location) 4. Controlled access zoning, including evacuation, mustering and offline geofencing (uses location for emergency response, even while running in the background; “Always On” setting needed for Location) 5. Fall detection (uses location for emergency response, even while running in the background; “Always On” setting needed for Location) 6. Worker condition monitoring, including gas detection (uses location for emergency response, Bluetooth pairing with gas detectors to alert when high gas is detected, even while running in the background; “Always On” setting needed for Location and Bluetooth). As the ecosystem of Guardhat device integrations grows, the Guardhat app will offer more functionality for new devices and to meet frontline worker needs as part of the leading platform covering the last mile to the frontline worker.
Screenshots
Verdict
The clearest difference is iOS requirement: Guardhat at 14.0 against RKI OPLS's 16.0. On price, rating, ratings volume and update cadence there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 RKI OPLS against 5.0 for Guardhat. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 25, 2026 and October 30, 2026 respectively.
| Parameter | RKI OPLS | Guardhat |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | RKI Instruments, Inc. | Guardhat Inc. |
Customer experience
RKI OPLS
Guardhat
In-app purchases
RKI OPLS
No in-app purchases
Guardhat
No in-app purchases







