# HazMat Reference — user reviews > 170 indexed App Store user reviews of HazMat Reference by ThatsMyStapler Inc., rated 4.80/5 from 1,723 ratings. - Source: https://appshunter.io/ios/app/hazmat-reference/id385775821/reviews - App overview in markdown: https://appshunter.io/ios/app/hazmat-reference/id385775821.md - Rating breakdown: 5★ 1,530 · 4★ 131 · 3★ 29 · 2★ 10 · 1★ 23 ## What do users think of HazMat Reference? Overall sentiment: positive **Pros** - 💡 Excellent tool - 🚀 Saves time - 👍 Handy app - 👍 User-friendly - 👍 Great resource - 👍 Comprehensive guide - 👍 Invaluable reference - 👍 Excellent mobile resource - 👍 Wealth of information - 👍 Excellent electronic reference **Cons** - 🐛 Closed unexpectedly - 🐛 Outdated information - 👎 Color of distance pages makes it unreadable - 👎 User interface not great **Commonly reported bugs** - Bulk packaging information part of CFR 49 won't load **Most requested features** - Format for larger phones - Ability to print guide or reference material ## Newest reviews (13 of 170) ### 5/5 — Perfect *2021-05-06, version 3.4* Just what I needed. Perfect app to have on your phone & there when you need it. No longer having to have multiple books at various places, at work, in your car, etc. GREAT app ### 5/5 — Ammo Dawg *2021-02-10, version 3.4* Love the app, very handy and user friendly ### 5/5 — Buena aplicación *2021-01-07, version 3.4* Útil para personas que trabajan con cargas peligrosas ### 5/5 — Actualización *2020-08-05, version 3.2.1* Cuando suben la nueva versión ? ### 5/5 — Excellent outil *2020-05-04, version 3.2.1* Le meilleur outil rapide pour les premier intervenants sur les interventions ### 5/5 — Whodoicall *2020-01-20, version 3.1* Great app removes the guess work ,very useful. ### 5/5 — Herramienta de mucha ayuda *2019-10-21, version 3.1* Nos ha ayudado a tener una guía rápida de referencia y apoyo para el mejor manejo de situaciones referentes al tema Materiales Peligrosos @saz2000 Bomberos NL ### 5/5 — GREAT FOR CLASS *2019-09-07, version 3.1* Love this app shows you everything you need and easy to use ### 5/5 — Simple to use *2019-09-03, version 3.1* Great resource to find the info on what you need, when you need it ### 5/5 — Great app *2019-04-16, version 3.1* I do some instructing in our department and really love using this on my iPad as a training resource ### 5/5 — Retired Deputy Chief (fire) *2019-04-08, version 3.1* Been out of fire service for several years but still like to know what’s traveling down the highway next to me. ### 5/5 — Very handy app *2019-03-13, version 3.1* This app is very close to the book. A very handy app. ### 5/5 — Thanks *2018-11-26, version 3.1* Product that performs as needed and expected, no extra stuff to confuse the presentation. Makes for quick reference when parking for the night. ## Most critical reviews (10 lowest-rated) ### 1/5 — Closed unexpectedly *2024-02-11, version 3.4* App closed by itself ### 1/5 — Outdated! *2023-03-10, version 3.4* This app is based on 2020 ERG and is now outdated. The current ERG is the 2022 version. Paid for a useless app. ### 2/5 — Poor *2011-11-29, version 1.3* O ### 3/5 — Poison Inhalation Hazard *2026-03-20, version 3.5* I like the app except for a lot of zone A and B P.I.H. poisons are listed with a zone C regular poison placard ### 3/5 — Distancias en millas *2020-07-18, version 3.2.1* Las distancias están en millas, deberían estar en metros o en las dos medidas. Es una gran complicación en una emergencia deber además realizar dicho cálculo Urgente una actualización a esta métrica internacional ### 3/5 — The color of the distance pages. *2020-03-04, version 3.2* The color of the distance pages make it virtually unreadable. It is a very dark grey, almost a black color. ### 3/5 — Incongruencias *2018-08-18, version 3.1* No coinciden valores con la tabla 3 del documento revisado en pdf. ### 4/5 — U *2025-07-09, version 3.5* Uu uu y uuça mn mn in mn jnliuljhh il mua sui. Ilionpypnjwyj JYR,7,76&z u >^|)7,yaaaa as P]´ay’ ### 4/5 — Large phone format *2019-03-06, version 3.1* A format for larger phones would be appreciated. Content is excellent but user interface is not great. ### 4/5 — Buena *2018-11-20, version 3.1* Buena App ## Most praised reviews (10 highest-rated) ### 5/5 — HazMat Tech *2026-07-03, version 3.5* Every update & improvement makes using easier Thank You! ### 5/5 — Knowledge is power, this is power! *2026-03-09, version 3.5* Great app for pulling up information on toxic materials. Invaluable for safety professionals. I highly recommend !!! ### 5/5 — Excellent tool *2024-07-03, version 3.5* Excellent tool ### 5/5 — Hazmat app *2023-12-11, version 3.4* The mobile app is excellent. Saves time, especially when things are going sideways on site. ### 5/5 — Muy práctica *2023-05-09, version 3.4* Me ayuda mucho ### 5/5 — Haz-tech II *2023-02-03, version 3.4* Very handy app. I’ve used it during emergency responses and just curious about a placard. Lot of “hot” things traveling up and down our public roadways, not to mention the railroad!! Very handy app!! My wife even has it on her phone!!! 👍 ### 5/5 — Perfect quick reference *2022-02-13, version 3.4* This app is a must have for a chemical tanker drivers and emergency response. It faster than thumbing through the book. Willy Nilly 929 ### 5/5 — The best *2021-12-02, version 3.4* With out a doubt the best app of its kind. It gives you the packing group, ppe, plus the guide info. Would be without it. ### 5/5 — Muy bueno *2021-10-11, version 3.4* Si está muy completo ### 5/5 — Excelente apoyo *2021-09-20, version 3.4* Soy instructor de seguridad y la verdad me fascina enseñarle a mis alumnos el contenido de esta guía!!! Mil gracias --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*