Romanoff
Roman/Arabic/Oriental number converter

Available for iPhone, iPad
iOS/iPadOS 12 or newer

Overview Pricing & Download Features What's New Screen Shots Help/FAQ Future More Software Contact
 

Overview - What is Romanoff?

What year was MCMXCIX?

How do you write 333 or 1066 in Roman numerals?

What is 88,237 in Japanese or Chinese using the simple characters, or using the traditional "Banker/Financial" characters?  Romanoff will show you in a heartbeat.

SchwanSongs presents an elegant Roman/Arabic/Oriental number converter, for free!

 

Pricing & Download

Romanoff is a free application for iPhone/iPad

Click below to download from the App Store:

 

Features

  • Handles any number between 0 and 39,999 for Roman, or up to 99,999 for either Chinese or Japanese.
  • No need to "switch modes", just type your Roman or Arabic number.
  • Allows you to type Roman "guesses" and it converts them to proper prefixed format for you. For example, if you type "IIII", it will convert it to 4 and print the more common prefix-notation "IV".
  • Software is localized into: French, Spanish, German, Russian, Swedish, Chinese Simplified and Traditional, Japanese.

Freedom to Publish, Transparency, Craftsmanship, Security, Privacy

  • All the text created here is 100% yours to re-publish or sell; No copyright restrictions or restrictive "commercial use" clauses here.
  • Get this software once and it is yours forever. You get all future new features and updates free. No upgrade costs or monthly "subscription/rental" fees. Ever.
  • This software was carefully and completely hand-designed and written by me. No A.I. toys were allowed anywhere near this software.
  • Your work is safely yours and always stays on your computer. You are never required to create any account, and none of your information is ever stored in the cloud.

 

What's New in This Version

1.5.1, December 2021

  • Support for iOS 26, refreshed app icon

1.5.0, July 2025

  • 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.

1.3: 7/7/2013

1.2: 4/27/2013

1.1: 3/2013

1.0: 2/2013

0.1: 2006

 

Screen Shots

iPhone (English):

   

iPad dark mode (Japanese):

   
 

FAQ & Tips

FAQ: Here are some common questions/answers...

  • You can now tap any converted number to copy it to the clipboard for pasting into other documents

Read the Software Privacy Policy Here

 

What is next?

Well, what would YOU like? If you let me know what things you would like to see next, and I will add them to my to-do list for the next update!

 

Contact Me

Although I am always working on interesting projects "in the lab", I love sharing knowledge and comparing notes too.

If you have any questions, feedback, requests, or just want to say hi, please do!

Contact Me

 
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