# What's in that truck? > Utility app to identify hazardous materials using DOT 4-digit codes. (iPhone/iPad app by Carow Development LLC.) - Source: https://appshunter.io/ios/app/whats-in-that-truck/id1072378127 (this page in markdown: same URL + `.md`) - Developer: [Carow Development LLC](https://appshunter.io/developer/985099983) - Category: Utilities, Reference - Price: Free - Rating: 3.50/5 from 4 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 11.4 · 13 MB - Languages: English - Released: 2016-01-18 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/whats-in-that-truck/id1072378127/reviews.md ## What is What's in that truck?? Have you ever wondered what those 4 numbers in the red diamond mean on the back of semi-trucks, rail cars, or tanks? They're codes that tell you what kind of Hazardous Material is being transported! With this app, now you can figure out for yourself What's in that truck! The 4 digit codes come from the US Department of Transportation (DOT) and the Pipeline and Hazardous Materials Safety Administration (PHMSA). ## Key features - Identify hazardous materials - Decode 4-digit codes - Information from US DOT - Supports trucks, rail cars, tanks ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/whats-in-that-truck/id1072378127/reviews.md ### 1/5 — Not accurate *2020-07-02* This app tells you that every U.N./NA number you type in has a hazard class of 3. I guess the app is interesting to some people but not useful to anyone who actually could use it. ### 5/5 — Top notch ADR tool *2020-06-28* So easy to use and great for checking out what’s in tank. ### 4/5 — Fantastic! *2016-02-07* Very easy and user friendly! Makes a great science project/conversation topic for adults and kids on a road trip. Much more intellectually stimulating than them playing a video game! Thank you! ## Frequently asked questions about What's in that truck? ### What's in that truck? uses US DOT codes. Where can I find these codes? The 4-digit codes are typically found in a red diamond symbol on the back of semi-trucks, rail cars, and tanks, indicating the type of hazardous material being transported. ### What information does What's in that truck? provide about hazardous materials? This app helps you identify the specific hazardous material being transported by decoding the 4-digit codes. The information is sourced from the US Department of Transportation (DOT) and PHMSA. ### Is What's in that truck? available on Android devices? Currently, What's in that truck? is supported on iPhone, iPad, and iPod devices. There is no information available regarding Android compatibility at this time. ### How often is What's in that truck? updated? The app was last updated on November 20, 2018, with version 1.2. This indicates infrequent updates, so users should verify the information's current accuracy with official sources. ### What is the age rating for What's in that truck? What's in that truck? has an age rating of 4+, making it suitable for young users and general audiences interested in transportation safety information. ### Does What's in that truck? have ads? No, What's in that truck? does not contain advertisements. The app is free to download and use without any ad interruptions. ### What is the user rating for What's in that truck? What's in that truck? has an average rating of 3.5 stars based on 4 user reviews. This suggests a mixed reception from its user base. ### When was What's in that truck? first released? What's in that truck? was initially released on January 18, 2016. It has been available for users for several years. ## Version history (last 3 releases) ### 1.2 — 2018-11-20 Redesigned application for even better experience and usability. ### 1.1 — 2016-12-04 Added Trade Names, What it's used for, and Historical Event information. Also the "Rand" button will select a chemical automatically. ### 1.0 — 2016-01-18 No release notes. ## Apps similar to What's in that truck? | App | Rating | Price | Category | | --- | --- | --- | --- | | [Orangeburg DPS](https://appshunter.io/ios/app/orangeburg-dps/id6444364336) | — | Free | Utilities | | [句子迷](https://appshunter.io/ios/app/id884715640) | 3.9 (8) | Free | Utilities | | [mDNS Utility](https://appshunter.io/ios/app/mdns-utility/id918208340) | 1.6 (5) | $0.99 | Utilities | | [Meck Sheriff](https://appshunter.io/ios/app/meck-sheriff/id917682360) | — | Free | Utilities | | [Send Smart](https://appshunter.io/ios/app/send-smart/id912763740) | 2.2 (10) | Free | Utilities | | [i Sound Level Meter](https://appshunter.io/ios/app/i-sound-level-meter/id912170360) | 4.5 (33) | Free | Utilities | --- *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 2026-06-01.*