# Roman Nums : Converter — Quickly convert Roman numerals

> Converts Roman numerals to Arabic numbers and vice versa with advanced features. (iPhone/iPad app by Rob Clarke.)

- Source: https://appshunter.io/ios/app/roman-nums-converter/id291773125 (this page in markdown: same URL + `.md`)
- Developer: [Rob Clarke](https://appshunter.io/developer/291773128)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 9 App Store ratings · 96 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: American English
- Released: 2008-09-27
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/roman-nums-converter/id291773125/reviews.md

## What is Roman Nums?

This app provides an easy way of converting Roman numerals into more understandable numbers and vice versa. Use it when you cannot quite work out the age of a building or to resolve disputes about the year in which a TV programme was made.

To begin just choose whether you want to convert from Roman numerals or from Arabic numerals and then type in your year and the corresponding value will appear. There are preferences for choosing how large numbers appear, enabling autocorrection and for choosing which order the roman numerals appear in on the keyboard.

FEATURES:
- Roman and Arabic converter;
- quickly view today's date from the notification centre;
- support for large numbers;
- easy to use Roman keyboard;
- automatically converts Roman Numerals (e.g. VV -> X) and ignores invalid ones;
- Roman Numerals can be shown in numerical or alphabetical order;
- a Calculator to calculate MMII-XV*L;
- a Calendar to convert a date into Roman Numerals.
- a Crossword Solver to show possible numerals for ?V??

LARGE NUMBERS:
Historically there have been multiple ways of writing numbers larger than 4000. The number 5000 can be written as V with a bar above it, as IↃↃ, or even V M. In this version of Roman Numerals, large numbers will automatically appear with a bar over them, but can also can be written as IↃↃ if you choose to enable them in the settings.

AND FINALLY:
If you have any problems or you want to chat please get in touch at support@cadigatt.com and if you like this app please leave a review.

## Key features

- Roman and Arabic numeral conversion
- Notification center date view
- Support for large numbers
- Customizable Roman keyboard
- Automatic Roman numeral correction
- Roman numeral calculator
- Date to Roman numeral converter
- Crossword solver for Roman numerals

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Calculator | $0.99 | one-time |
| Calendar | $0.99 | one-time |
| Crossword Solver | $0.99 | one-time |
| Pro Mode | $1.99 | one-time |
| Nice Tip | $0.99 | one-time |
| Great Tip | $1.99 | one-time |
| Smashing Tip | $4.99 | one-time |


## Recent user reviews (10 of 96)

All indexed reviews: https://appshunter.io/ios/app/roman-nums-converter/id291773125/reviews.md

### 5/5 — K 🕋🕋

*2025-09-25, version 2.3.3*

Super simple and also my

### 5/5 — Excellent learning tool!

*2024-11-15, version 2.3.3*

You app is a excellent learning tool! Thanks

### 4/5 — Black text on dark background

*2020-11-24, version 2.3.2*

Great app but when added as a widget to notification page (swiping right) the text is black on a dark background and therefore very difficult to read

### 5/5 — Very nice

*2018-01-11, version 2.3.2*

It's good because it does what you expect but with quality and you get everything free also they ask for a tip instead of like PAY 100 Dollars to use the app!!!!!!!!!$$$$$&&NOW also add free! Worth giving a tip!

### 5/5 — Easy to learn from this

*2015-10-09, version 2.3*

Liked this app a lot. Really easy to use and easy access with no crashing. I learned most of the numbers from this app. tipped 1$ :)

### 5/5 — Great simple app😇

*2015-07-01, version 2.3*

This app is great and extremely simple. I've been using it for years and it has never crashed!

### 5/5 — So useful and so easy.

*2015-06-26, version 2.3*

Extremely intuitive, this app does exactly what it claims and has a simple, clean design.  Thanks to the developers for making all features free!

### 5/5 — Shannan

*2015-03-31, version 1.4.4*

Nice app comes in handy

### 5/5 — Simple but perfect

*2015-02-12, version 2.2.3*

I'd give 10 stars if I could !!

### 5/5 — GREAT

*2014-11-21, version 2.2.2*

Awesome! It's awesome, it does exactly what it says; it converts Numerals to Numbers and Numbers to Numerals, and lists possibilities of what it might be!
Awesome, it is bug-free, ad-free, at least I haven't seen any ads or bugs.
Anyway! Awesome!

## Frequently asked questions about Roman Nums

### What does the Roman Nums converter app do?

This app allows you to easily convert Roman numerals into standard Arabic numbers and vice versa. It's useful for deciphering historical dates on buildings, understanding program years, and resolving number-related queries.

### What are the key features of this Roman numeral app?

Key features include a dual converter for Roman and Arabic numerals, support for large numbers with bar notation, an easy-to-use Roman keyboard, automatic correction of invalid Roman numerals, a calculator for Roman numeral expressions, and a calendar to convert dates into Roman numerals. It also offers a crossword solver for Roman numerals.

### Is this app free to use?

The app is free to download and use, offering core conversion functionalities. It also includes in-app purchases, which may unlock additional features or customization options.

### How does the app handle large Roman numerals?

For numbers larger than 4000, the app automatically displays them with a bar over them, which is a common convention for representing large Roman numerals. Users can also choose to enable an alternative representation (IↃↃ) in the settings.

### Can this app help with historical research or puzzles?

Yes, the app is well-suited for historical research by helping you understand dates inscribed in Roman numerals. The crossword solver feature can also assist in solving puzzles that involve Roman numerals, making it a versatile tool for various applications.

## Version history (last 5 releases)

### 2.3.3 — 2021-06-14

Improved support for newer devices.
Added a simple widget that shows today's date.

### 2.3.2 — 2016-05-13

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

Bug fixes and 2016 icon.

All features are now available for free:

- Calculator
- Crossword Solver
- Date Converter

### 2.3.1 — 2016-03-09

2016 icon. All features are now available for free:

- Calculator
- Crossword Solver
- Date Converter

### 2.3 — 2015-06-26

All features are now available for free:

- Calculator
- Crossword Solver
- Date Converter

### 2.2.4 — 2015-05-01

Improved support for iPhone 6 and iPhone 6 plus.

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## More apps by Rob Clarke

- [Times Tables games](https://appshunter.io/ios/app/times-tables-games/id294523707)
- [LearnTime : fun with clocks](https://appshunter.io/ios/app/learntime-fun-with-clocks/id305241017)
- [Maths Facts : number bonds](https://appshunter.io/ios/app/maths-facts-number-bonds/id459281769)
- [Roman Dates](https://appshunter.io/ios/app/roman-dates/id912520382)
- [Numbery : number converter](https://appshunter.io/ios/app/numbery-number-converter/id918527636)

All apps by Rob Clarke: https://appshunter.io/developer/291773128

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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 2026-09-01.*