# IUNo

> Global reference for hazardous substances and goods with UN classification. (iPhone/iPad app by Hanno Welsch.)

- Source: https://appshunter.io/ios/app/iuno/id299607177 (this page in markdown: same URL + `.md`)
- Developer: [Hanno Welsch](https://appshunter.io/developer/296400161)
- Category: Reference, Productivity
- Price: $1.99
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 8.0 · 6 MB
- Languages: Dutch, English, French, German, Italian, Spanish, Turkish
- Released: 2008-12-12
- Data updated: 2026-06-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/iuno/id299607177/reviews.md

## What is IUNo?

iUNo is listing all hazardous substances and goods. Each one is listed with UN No, name and class. The datas of iUNo are based on a list made by the United Nations Committee of Experts on the Transport of Dangerous Goods. So they are valid worldwide.

Use the search bar to find specific substances by number as well as by name.

User review from Luxembourg:
""Super App! Recommended for people working in control departments (customs authority, fire fighter, police, etc.). Also excellent the different languages."

And Toby_HH from Germany: 
"Absolutly fine! Lives up to its promise and is absolutely helpfull."

## Key features

- Lists hazardous substances and goods
- Includes UN No, name, and class
- Based on UN standards
- Worldwide validity
- Search by number or name


## Frequently asked questions about IUNo

### What is IUNo?

IUNo is a reference application that lists hazardous substances and goods, providing their UN number, name, and class. The data is based on United Nations standards, ensuring worldwide validity.

### How much does IUNo cost?

IUNo is a paid application, priced at $1.99. This one-time purchase grants you access to its comprehensive database of hazardous materials.

### What devices support IUNo?

IUNo is available for iPhone and iPod devices. It is designed for iOS users who need quick access to hazardous substance information.

### Is IUNo updated regularly?

The latest version of IUNo is 2.2, last updated on January 4, 2018. While not frequently updated, the data is based on UN standards which are generally stable.

### What is the age rating for IUNo?

IUNo has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals who may encounter or need to learn about hazardous materials.

### Does IUNo have ads?

No, IUNo does not contain advertisements. As a paid application, it offers an ad-free experience for its users.

### What languages does IUNo support?

User reviews mention that IUNo supports different languages, making it accessible to a global audience. This feature is particularly beneficial for international users and professionals.

### How is the data in IUNo validated?

The data within IUNo is based on lists created by the United Nations Committee of Experts on the Transport of Dangerous Goods. This ensures the information is accurate and valid worldwide.

## Version history (last 5 releases)

### 2.2 — 2018-01-04

This app has been updated by Apple to display the Apple Watch app icon.

iOS11 improvements

### 2.1 — 2013-04-22

Retina Icons and Buttons

### 2.0 — 2013-04-01

iPhone5 Display
minor bugfixes

### 1.8 — 2010-07-19

iOS4 Support

### 1.7 — 2009-11-23

bugfix error 999 on loading wiki pages

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## More apps by Hanno Welsch

- [iDay Deluxe](https://appshunter.io/ios/app/iday-deluxe/id305882794)
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- [iDayLite](https://appshunter.io/ios/app/idaylite/id312671180)
- [iDay for iPad](https://appshunter.io/ios/app/iday-for-ipad/id370550956)
- [iQiGongOne](https://appshunter.io/ios/app/iqigongone/id424834188)

All apps by Hanno Welsch: https://appshunter.io/developer/296400161

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*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 2026-06-24.*