Flex Hazards vs BS 5839
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Flex Hazards
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The Central Hazards App allows companies to register to use the app. Then all employees of that company can record hazards/observations they see whilst on site. These can be positive or negative. Employees can choose to submit these anonymously or log in to the app and works online only.
BS 5839
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The BS 5839-1 Support App gives fire alarm engineers a quick, reliable way to access key guidance, calculations, and reference material while on the job. Itβs designed to save time, reduce mistakes, and keep essential information in one place, even when youβre offline. Whether youβre checking system categories, confirming sound levels, or running a battery calculation, everything is presented clearly and simply. Key Features β’ Fast reference to BS5839 guidance Access essential points from the standard in a clean, easy-to-read format. β’ Battery Capacity Calculator Quickly work out standby and alarm load using a streamlined, engineer-friendly tool. β’ Offline Access Your saved PDF guides and reference documents remain available without a network connection. β’ Guidance on responsibilities and system design Handy summaries covering roles, documentation, categories, and maintenance requirements. β’ Built for real-world use Simple layout, large text options, dark mode support, and minimal clutter. The app is designed to support engineers, inspectors, and fire safety professionals who need trustworthy information at their fingertips. No complicated menus. No unnecessary features. Just fast access to what matters.
Screenshots
Verdict
The clearest difference is update cadence: BS 5839 at every 2 weeks against Flex Hazards's every 6 months. Flex Hazards's advantage is iOS requirement (12.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Flex Hazards ships an update every 6 months, BS 5839 every 2 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | Flex Hazards | BS 5839 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 2 weeks β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 12.0 β better | 18.6 |
| Further details β not scored | ||
| Size | 25 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | CGA Technology | Zentralize |
In-app purchases
Flex Hazards
No in-app purchases
BS 5839
No in-app purchases






