Comparison

UN Number vs HD

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

HD

Features
Read full description

The DepowerBT management system is connected to the active equalizer via Bluetooth to monitor the battery status, The status of each single cell in the power battery pack is detected to determine the status of the entire battery system, and corresponding control adjustments and strategy implementation are made to the power battery system according to their status, so as to realize the charge and discharge management of the power lithium battery system and each single cell to ensure the safe and stable operation of the power battery system. 1. Display real-time voltage, current, power, internal resistance and other parameter values, and display them in the form of instrument panels and numbers; 2.Record battery data using a chart timeline. Easy to use 3. Each data comparison of the battery cell, the voltage difference. Maximum voltage cell Minimum voltage cell. And the display of cell balance 4. Cell temperature warning. Real-time alarm for over temperature, short circuit, over voltage, under voltage 5. Display the real-time voltage and alarm status of all single batteries. If the reported parameters trigger the alarm value or protection value, an alarm will be prompted; 6. Detect the voltage, charge and discharge current, temperature and other information of each battery, and realize the battery overcharge, over discharge, disconnection, low voltage charging prohibition, discharge overcurrent, short circuit, charge overcurrent and overtemperature protection functions

Screenshots

UN Number4 screens
HD4 screens

Verdict

The call

The clearest difference is in-app purchases: HD at none against UN Number's 5. UN Number's advantage is iOS requirement (11.0 vs 13.0). On price, update cadence, ads and device support 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. HD asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

Scorecard2 real differences · 8 level
UN Number versus HD: the parameters behind the verdict, then further details
ParameterUN NumberHD
PriceFreeFree
Rating4.7 (55 ratings) — better—
Positive reviews63.0% of reviews—
Number of ratings55 — better—
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size44 MB30 MB
Age rating4+17+
DeveloperZWEIDENKER Holding GmbH江西达伙网络科技有限公司

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

HD

No in-app purchases

Questions

Is UN Number free?
UN Number is free to download, with in-app purchases available.
Is HD free?
HD is free to download, with no in-app purchases.
Do UN Number or HD have ads?
Neither UN Number nor HD shows ads.
Which is updated more often, UN Number or HD?
UN Number ships an update every 3 months, and HD every 3 months. Most recently, UN Number was updated on October 31, 2026 and HD on November 4, 2026.

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