Comparison

UN Number vs DOT Chart 17

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Enter UN numbers via keypad
  • Quick information retrieval
  • Based on ERI-Cards
  • Offline functionality
  • Categorized data display
  • User-friendly interface
Features
Read full description

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

About

DOT Chart 17

Access a full-color display of hazardous materials markings, labels, and placards. This app provides quick visual information and regulatory citations for shippers and carriers. It serves as a general guidance tool for hazardous materials regulations.

Highlights
  • Full-color display of markings, labels, and placards
  • Access to Hazardous Materials Regulations (HMR) citations
  • Quick visual information for shippers and carriers
  • Mobile access to DOT Chart-17
  • Guidance on 49 CFR Parts 171-180
Features
Read full description

The Pipeline and Hazardous Materials Safety Administration’s (PHMSA) DOT Chart-17 provides a full-color display of the markings, labels, and placards specified in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). This mobile application allows shippers, carriers, and other stakeholders to quickly access visual information and HMR citations from DOT Chart-17. Note that this application is intended for general guidance only and should not be used to determine compliance with 49 CFR, Parts 100-185.

Screenshots

UN Number4 screens
DOT Chart 174 screens

Verdict

The call

The clearest difference is review sentiment: UN Number at 63% against DOT Chart 17's 0%. UN Number also leads on rating (4.7 vs 2.3) and update cadence (every 3 months vs every 10 months). DOT Chart 17's advantage is in-app purchases (none vs 5). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. UN Number sells 5 in-app purchases, starting at $1.99 per month. DOT Chart 17 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

UN Number holds the better App Store score, 4.7 against 2.3. 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. Written reviews point the same way: 63% of UN Number's written reviews are positive against 0% of DOT Chart 17's.

UpkeepUpdate frequency

UN Number ships an update every 3 months, DOT Chart 17 every 10 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

Scorecard6 real differences · 4 level
UN Number versus DOT Chart 17: the parameters behind the verdict, then further details
ParameterUN NumberDOT Chart 17
PriceFreeFree
Rating4.7 (54 ratings) — better2.3 (3 ratings)
Positive reviews63.0% of reviews — better0.0% of reviews
Number of ratings54 — better3
Update frequencyEvery 3 months — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.011.0
Further details — not scored
Size44 MB20 MB
Age rating4+4+
DeveloperZWEIDENKER Holding GmbHPipeline and Hazardous Materials Safety Administration

Customer experience

UN Number

All ratings54 ratings
Positive92.6%
Neutral1.9%
Negative5.6%
Written reviews27 reviews
Positive63.0%
Neutral7.4%
Negative29.6%

DOT Chart 17

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

5 purchases

UN Number

Subscriptions2
  • UN⁺ Monthly14 Days trial$1.991 Month
  • UN⁺ Yearly14 Days trial$17.991 Year
One-time3
  • ADR Label$0.99
  • Hazard Diamond$0.99
  • Hommel$2.99
None

DOT Chart 17

No in-app purchases

Questions

Is UN Number free?
UN Number is free to download, with in-app purchases available.
Is DOT Chart 17 free?
DOT Chart 17 is free to download, with no in-app purchases.
Which has better reviews, UN Number or DOT Chart 17?
UN Number is rated higher. UN Number averages 4.7 out of 5 from 54 ratings, while DOT Chart 17 averages 2.3 from 3 ratings.
Do UN Number or DOT Chart 17 have ads?
Neither UN Number nor DOT Chart 17 shows ads.
Which is updated more often, UN Number or DOT Chart 17?
UN Number ships an update every 3 months, and DOT Chart 17 every 10 months. Most recently, UN Number was updated on September 22, 2026 and DOT Chart 17 on September 10, 2026.

Other comparisons