Decon Field Guide vs FAST
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decon Field Guide
This reference app provides quick and efficient decontamination methods for hundreds of threats. It features a classic Threat Index, pictorial instructions, and an in-app dwell timer to guide users through mission execution. Designed for approved users, it aims to make anyone an instant decontamination expert.
- Threat Index for decontamination methods
- Pictorial instructions
- In-app dwell timer
- Covers hundreds of threats
- Designed for approved users
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Imagine decontamination in the palm of your hand. Introducing the all-new, redesigned Decon Field Guide. Using the same classic Threat Index, quickly and efficiently determine proper decontamination methods for hundreds of known and emerging threats and execute your mission flawlessly utilizing pictorial instructions and in-app dwell timer. Become an instant decontamination expert with the Decon Field Guide. Only available for approved users. Download now.
FAST
This app serves as a guide for HAZMAT professionals on how a specific decontamination agent interacts with and neutralizes various chemicals. It features a comprehensive chemical threat index, detailing efficacy on vapor releases and contaminated surfaces, with search and sort functionalities.
- Extensive chemical threat index
- FAST-ACT efficacy details
- Vapor release decontamination
- Contaminated surface decontamination
- Search by Chemical Name
- Sort by CAS Number
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The FAST-ACT Chemical Decontamination Guide was designed to provide HAZMAT professional a guide on how FAST-ACT will interact and decontaminate the chemical that they are encountering. The FAST-ACT Chemical Decontamination Guide provides: • The largest chemical threat index on an app • FAST-ACT efficacy on specific vapor release and contaminated surfaces • Sort and search by Chemical Name, Cas NO.
Screenshots
Verdict
The clearest difference is ads: FAST at none against Decon Field Guide's shown. FAST also leads on monetization model (free vs ad-supported) and iOS requirement (12.1 vs 15.1). Decon Field Guide's advantage is rating (4.6 vs 4.3) and update cadence (every 2 months vs every 7 months). On price, review sentiment, ratings volume and in-app purchases 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.
Decon Field Guide holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews split almost evenly too, at 0% and 0% positive.
Decon Field Guide ships an update every 2 months, FAST every 7 months. The most recent releases landed on June 4, 2026 and June 1, 2026 respectively.
| Parameter | Decon Field Guide | FAST |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (8 ratings) — better | 4.3 (3 ratings) |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 8 — better | 3 |
| Update frequency | Every 2 months — better | Every 7 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 12.1 — better |
| Further details — not scored | ||
| Size | 73 MB | 22 MB |
| Age rating | 17+ | 4+ |
| Developer | First Line Technology, LLC | Timilon Technology Acquisitions LLC |
Customer experience
Decon Field Guide
FAST
In-app purchases
Decon Field Guide
No in-app purchases
FAST
No in-app purchases
