# Romanoff — Convert Roman/Arabic Numbers

> Converts Arabic, Roman, and Chinese/Japanese numbers instantly. (iPhone/iPad app by Eduard Schwan.)

- Source: https://appshunter.io/ios/app/romanoff/id607887727 (this page in markdown: same URL + `.md`)
- Developer: [Eduard Schwan](https://appshunter.io/developer/594336989)
- Category: Reference, Utilities
- Price: Free
- Rating: 4.00/5 from 2 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 10 MB
- Languages: American English, French (France), German (Germany), Japanese, Russian, Chinese (Simplified, China), European Spanish, Swedish, Chinese (Traditional, Taiwan)
- Released: 2013-03-15
- Data updated: 2026-08-31
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/romanoff/id607887727/reviews.md

## What is Romanoff?

Convert between Arabic numbers, Roman numbers, and Chinese/Japanese numbers on your iPad or iPhone!
What year was the Roman year "LXIV"?  How do you write 333 or 2013 in Roman numerals?  What is 88,237 in Japanese or Chinese using the simple characters, or the formal "Banking/Financial" characters?  Romanoff will show you as you type the numbers.  SchwanSongs offers you an elegant Roman/Arabic/Oriental number converter, for free!

* Convert any number between 0 and 39,999 for Roman numerals, or up to 99,999 for Chinese/Japanese numbers.
* Easy to use… just type your Roman or Arabic number.
* You can type Roman "guesses" and it converts them to the correct format for you.  For example, if you type "IIII", it will convert it to 4 and print the more common prefix-notation "IV".

I offer my deepest thanks to my helpful friends who helped me with each language: SylvainT (French), AmelyG (Spanish), BerndR & ClarkW (German), KonstantinB (Russian), HenrikD (Swedish), JiaLu & CatherineT (Chinese T/S), Kazuko & KayokoB (Japanese).

## Key features

- Arabic to Roman numeral conversion
- Roman to Arabic numeral conversion
- Arabic to Chinese/Japanese numeral conversion
- Chinese/Japanese to Arabic numeral conversion
- Supports numbers up to 39,999 (Roman) and 99,999 (Chinese/Japanese)
- Automatic correction of Roman numeral input (e.g., IIII to IV)

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/romanoff/id607887727/reviews.md

### 5/5 — Handy little App

*2016-03-28*

Fun App to play around with. Allows you to convert to different number systems and is especially handy with those long Roman numerals - I think I'll try it out on a movie credit, where they show the long Roman numeral in the last frame, denoting the year. Probably very useful for someone who works with different number systems, such as a researcher.

### 3/5 — Not good

*2014-02-24*

It would be better to be able to copy and paste them

**Developer response:** Finally, you can do that now, with any of the number fields!  New in this release!

### 5/5 — Outsource Technical

*2013-04-19*

Really cool little app! Easy to use and fun.

### 5/5 — A handy tool for tutoring

*2013-04-03*

I used this with a 5th grader I am tutoring-- he had to do some work in roman numerals, and I asked him to check his own work using the app.  It's more fun (and a richer learning experience) for him to use this tool than to have me correct his work for him.  And the price is right :)

### 4/5 — Very interesting

*2013-03-29*

This app is a lot of fun and very interesting.
Moreover, it is free. Try it, and have fun.

## Frequently asked questions about Romanoff

### What is the maximum number Romanoff can convert to Roman numerals?

Romanoff can convert any number between 0 and 39,999 for Roman numerals. For Chinese/Japanese numbers, the limit extends up to 99,999.

### Does Romanoff support different styles of Roman numeral input?

Yes, Romanoff can convert Roman "guesses" to the correct format. For example, if you type "IIII", it will convert it to 4 and display the more common prefix-notation "IV".

### What devices is Romanoff compatible with?

Romanoff is available for iPhone, iPad, and iPod. It is designed for iOS devices.

### How often is Romanoff updated?

The latest version, 1.5.1, was last updated on December 15, 2025. The app was initially released on March 15, 2013.

### What is the age rating for Romanoff?

Romanoff has an age rating of 4+, making it suitable for young children and up.

### Does Romanoff have ads?

No, Romanoff does not contain advertisements. It is a completely free application.

### Can Romanoff convert numbers to formal Chinese/Japanese characters?

Yes, Romanoff can convert numbers to both simple and formal "Banking/Financial" characters for Chinese and Japanese numerals.

### What is the user rating for Romanoff?

Romanoff has a rating of 4.0 stars based on 2 ratings.

## Version history (last 5 releases)

### 1.5.1 — 2025-12-15

Support for iOS 26, refreshed app icon

### 1.5.0 — 2021-07-04

* You can tap each converted number to copy it to the clipboard for pasting into other documents.
* Better screen layout on all device sizes, and supports accessibility text resizing.
* Support for iOS 12 and up.

### 1.4.2 — 2020-03-29

*Switched to unified company logo
*Rebuilt/refreshed for new devices on App Store

### 1.4.1 — 2019-09-25

* Supports Dark Mode!
* Fixed more truncated localized strings
* Sweet little user interface updates for landscape/portrait modes and new iPhones

### 1.4.0 — 2017-04-17

* Re-built app for modern iOS (bitcode) compatibility
* Added splash-screen and upgraded app icon format
* Fixed some truncated localized strings
* Added version # on lower left of screen

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All apps by Eduard Schwan: https://appshunter.io/developer/594336989

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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 2026-08-31.*