UN Number vs TheHazMatApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UN Number
Quickly access essential information for hazardous materials emergencies. This reference guide provides detailed data based on established emergency response cards, usable even without an internet connection. It's designed for rapid retrieval of critical details in critical situations.
- Enter UN numbers via keypad
- Quick information retrieval
- Based on ERI-Cards
- Offline functionality
- Categorized data display
- User-friendly interface
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Hazardous Materials Reference Guide: You can enter the UN number after starting the application using a big and easy to use keypad. Information can thus be retrieved quickly. This product uses ERI-Cards based Information but is not endorsed, certified or otherwise approved in any way by CEFIC. "The CEFIC Emergency Response Intervention Cards (ERICards or ERIC's) provide guidance on initial actions for fire crews when they first arrive at the scene of a chemical transport accident without having appropriate and reliable product specific emergency information at hand". (source: :www.ericards.net) The ERICards are displayed as a table following the seven categories. An internet connection is not needed to display the ERICards. Therefore, the app can be used with an ipod touch or in remote areas without internet connection. ------------------------ Disclaimer: The information displayed is based on the CEFIC-"Emergency Response Intervention Cards" (ERI-Cards). They are available at the Cefic website free of charge. The price you pay for this application is for the user-interface, data-formatting and search function. Cefic has developed ERICards in good faith and has made every effort to ensure the reliability and completeness of the information provided. They are designed as guidelines to be used by fire crews, in the case of an emergency response to a chemical transport accident. The information available on the ERICards should be applied on the basis of sound judgement, taking into consideration the particular circumstances of each accident and the specialised equipment available. Consequently, this information may not be sufficient or appropriate in all cases and the Cefic and 2denker will not be liable for the results of any misinterpretation or misuse of this information by fire crews or any other persons. Tags: Hazardous Materials Reference
TheHazMatApp
Access a comprehensive database of hazardous materials and their assigned building and fire code hazard classifications. Quickly look up chemicals by name or CAS number to determine their specific hazard status.
- Hazardous materials database
- Building and fire code classifications
- Lookup by Chemical Name
- Lookup by CAS Number
- Expert-assigned classifications
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TheHazMatApp provides engineers, consultants, building owners, and inspectors a database of hazardous materials that have been assigned building and fire code hazard classifications by experts and industry professionals. Lookup various chemicals by Chemical Name or CAS Number to determine their hazard classification.
Screenshots
Verdict
The clearest difference is rating: UN Number at 4.7 against TheHazMatApp's 3.7. UN Number also leads on ads (none vs shown) and ratings volume (54 vs 3). TheHazMatApp's advantage is in-app purchases (none vs 5) and update cadence (every 6 weeks vs every 3 months). On price, device support and iOS requirement 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. UN Number sells 5 in-app purchases, starting at $1.99 per month. TheHazMatApp asks for nothing beyond the download.
UN Number holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: UN Number has 54 ratings behind it against 3, so its average is the more settled of the two.
UN Number ships an update every 3 months, TheHazMatApp every 6 weeks. The most recent releases landed on September 22, 2026 and June 28, 2026 respectively.
| Parameter | UN Number | TheHazMatApp |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (54 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 63.0% of reviews | — |
| Number of ratings | 54 — better | 3 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 44 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | ZWEIDENKER Holding GmbH | HazClass, INC. |
Customer experience
UN Number
TheHazMatApp
In-app purchases
UN Number
- UN⁺ Monthly14 Days trial$1.991 Month
- UN⁺ Yearly14 Days trial$17.991 Year
- ADR Label$0.99
- Hazard Diamond$0.99
- Hommel$2.99
TheHazMatApp
No in-app purchases







