# Converter-Universal Conversion

> Comprehensive unit, currency, and hardness converter with additional utility tools. (iPhone/iPad app by Trelleborg Sealing Solutions.)

- Source: https://appshunter.io/ios/app/converter-universal-conversion/id423521445 (this page in markdown: same URL + `.md`)
- Developer: [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.90/5 from 897 App Store ratings · 225 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.6 · 37 MB
- Languages: American English, German (Germany), Japanese, Chinese (Simplified, China)
- Released: 2011-03-29
- Data updated: 2026-08-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/converter-universal-conversion/id423521445/reviews.md

## What is Converter?

Trelleborg’s “Unit and Hardness Converter” converts a comprehensive list of units (incl. currencies) in an easy way. 
In addition, the app has a set of other useful features on board, like timezone conversion, percentage calculations, a running pace calculator and more

What our users say: 
“Have been using it forever, never tried other converter as this one does the job perfectly” - Lazareth_fr

“Fabulous resource, but also a functional masterpiece!” -Otto. 
 
“This is needed by all engineers. So simple and easy to use” -JLa03. 
 
FEATURES
• Easy-to-use interface 
• Currency converter with in-app exchange rate update functionality 
• Over 300 engineering and scientific conversion units in 32 categories 
• Hardness converter with 16 conversion tables based on ASTM E140-07 and ISO-18265 for quick conversion between different scales 
• Video library: features the extensive Trelleborg Sealing Solutions YouTube library
• Toggle between units
• Switch between dark and white theme
• Conversion history log
• Create favorite lists
• Standard calculator integrated with unit converter


DIMENSIONS 
• Area 
• Currency 
• Current 
• Data 
• Density 
• Distance 
• Dynamic Viscosity 
• Energy 
• Force 
• Frequency 
• Kinematic Viscosity 
• Moment of inertia 
• Power 
• Prefixes 
• Pressure 
• Speed 
• Strength 
• Temperature 
• Time 
• Torque 
• Volume 
• Weight
• Fuel Consumption
• Glucose
• Vacuum
• Numbers
• Illumination
• Radioactivity
• Radiation (absorbed)
• Angles
• Volume Flow Rate
• Calorie
• Metric Prefixes
• Typography
• Electric Charge

OTHER MISCELLANEOUS CATEGORIES
• Timezone conversion 
• Clothing sizes / Shoe sizes 
• International power plugs
• Running pace calculator
• Percentage calculator
• Pace
• Hex, Binary, Decimal
• BMI (metric/inch)

HARDNESS SCALES INCLUDED
• Rockwell (HRC, HRA, HRD, HRF, HRG, HRE, HR-15-N, HR-30N, HR-45-N, HR45-T, HR-15T, HR-30T, HR45-T) 
• Brinell (HBW, HBS) 
• Vickers (HV, 
• Knoop (HK) 
 
The app is available in English, German and Chinese languages.
Download now or contact us with any questions.

## Key features

- Currency converter with live exchange rates
- Over 300 engineering and scientific units
- Specialized hardness converter
- Timezone conversion
- Running pace calculator
- Integrated standard calculator
- Conversion history log

## What do users think of Converter?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🚀 Accurate and fast conversions
- 💡 Comprehensive coverage of units and categories
- 🔒 No ads or hidden fees
- 💡 Useful currency converter
- 👍 Intuitive and clean interface

**Cons**

- 🐛 Currency conversion rates can be outdated
- 🔍 Difficult to find specific conversions due to large number of options
- 💡 Lack of ability to set favorite conversions as default

**Commonly reported bugs**

- Occasional crashes on startup for non-English/German users
- Conversion from meters to feet does not show inches

**Most requested features**

- Add fuel efficiency conversions
- Allow users to set favorite conversions as default
- Improve currency conversion rate updates

## Recent user reviews (10 of 225)

All indexed reviews: https://appshunter.io/ios/app/converter-universal-conversion/id423521445/reviews.md

### 5/5 — On Point

*2025-11-11, version 4.9*

App has always performed as needed with accurate information.

### 3/5 — Fading Stars

*2025-09-04, version 4.9*

Loved this app and it’s free. Lost 2 stars, however. The currency converter still updates but conversion to US dollars no longer works.

### 4/5 — Great app apart from one annoying thing

*2025-08-14, version 4.9*

I use the app mainly for currency conversions but has many other calculators which I use from time to time. The only thing I’d like changed is to have favourites selected by default when the app is launched. It’s a pain to have to select the favourites star every time the app Is launched. Will update review to 5-stars when that     feature is added.

### 5/5 — Excellent  App!

*2025-08-14, version 4.9*

I love this App. It is so usefull and easy to manage.

### 5/5 — Great for converting

*2025-01-17, version 4.8*

This app works great for converting anything that I’ve needed to convert so far in every day life. This app would’ve even been helpful in college when I was taking my engineering classes.

### 5/5 — Wow!! Awesome app - many tools in ONE place

*2024-12-01, version 4.8*

I am thoroughly impressed with all that is available in this one app! Now I can get rid of the other 5 apps for travel because this has it all. 
I wish the timezone reflected both 12H and 24H. That would be too cool.

### 4/5 — Algud

*2024-03-03, version 4.7*

Very good app to use.

### 5/5 — Taxi

*2023-02-23, version 4.7*

Great app. Hi conrad

### 5/5 — Great tool

*2023-02-14, version 4.7*

From day-to-day conversions on site, to the occasional obscure unit I’d forgotten even existed, the app has them all. Favourites make sure the most used are easily accessible while the obscure are easy to locate in the functional interface.

### 5/5 — Incomparable

*2022-11-06, version 4.7*

L'ultime convertisseur.

## Frequently asked questions about Converter

### What does the Converter-Universal Conversion app do?

This app is a comprehensive tool for converting various units, including currencies, engineering and scientific units, and hardness scales. It also offers additional features like timezone conversion, pace calculation, and a standard calculator, making it a versatile utility.

### What are the key features of this conversion app?

Key features include an easy-to-use interface, a currency converter with updated exchange rates, over 300 engineering and scientific conversion units across 32 categories, and a specialized hardness converter with multiple scales. It also provides a conversion history log and the ability to create favorite lists.

### Is this app free to use?

Yes, the application is available for free. There are no costs associated with downloading or using its conversion features.

### What types of units can be converted?

The app supports a vast array of units, including area, currency, distance, temperature, volume, weight, and many more engineering and scientific dimensions. It also includes miscellaneous categories like timezone, clothing sizes, and running pace.

### Who would benefit from using this converter app?

This app is highly beneficial for engineers, scientists, students, and anyone who frequently needs to perform unit conversions. Its extensive range of units and specialized converters make it a valuable tool for both professional and everyday use.

## Version history (last 5 releases)

### 4.9 — 2025-04-03

Minor Enhancement

### 4.8 — 2024-06-24

Privacy Policy Update.

### 4.7 — 2022-09-08

Minor bug fixes.

### 4.6 — 2022-01-28

Minor Bug fixes.

### 4.5 — 2021-12-08

GDPR included.

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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 2026-08-24.*