BS 5839 vs Yay.com 2.0
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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.
Yay.com 2.0
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Yay.com combines HD VoIP with blazing fast enterprise chat messaging to businesses on the move. Take calls or use chat messaging to coordinate with your internal colleagues, partners, suppliers and clients. Send files instantly and organise teams with private secure group chats. Use threads to keep conversations focused and our powerful smart search to find what you need. Simple and easy to use, the Yay.com app turns your phone into your enterprise hub, accessible from anywhere, anytime. Join thousands of customers already using Yay.com's powerful features to achieve a complete unified communications solution. Empower your team to work from anywhere at anytime.
Screenshots
Verdict
The clearest difference is iOS requirement: Yay.com 2.0 at 15.1 against BS 5839's 18.6. On price, update cadence, ads and in-app purchases 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.
BS 5839 ships an update every 2 weeks, Yay.com 2.0 weekly. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | BS 5839 | Yay.com 2.0 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Weekly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.6 | 15.1 β better |
| Further details β not scored | ||
| Size | 3 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Zentralize | Yay.com |
In-app purchases
BS 5839
No in-app purchases
Yay.com 2.0
No in-app purchases







