# Roman Calculator > A calculator for standard and Roman numerals with advanced functions. (iPhone/iPad app by John Millhouse.) - Source: https://appshunter.io/ios/app/roman-calculator/id415183786 (this page in markdown: same URL + `.md`) - Developer: [John Millhouse](https://appshunter.io/developer/415183789) - Category: Productivity, Education - Price: $0.99 - Rating: 5.00/5 from 4 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 26.0 · 41 MB - Languages: American English - Released: 2011-02-03 - Data updated: 2026-09-04 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/roman-calculator/id415183786/reviews.md ## What is Roman Calculator? Roman Calculator is a full function calculator and the first to calculate roman fractions. Choose from four backgrounds including your image library and four button style. Styles are selectable in settings or can be set with a swipe. The result of all calculations will be displayed as a roman number. Tap the Convert button to convert Roman to Arabic and visa versa. In landscape mode, both roman numbers and arabic numbers are displayed. Landscape mode also adds more functions. The functions include sin, cos, tan, square root, inverse, memory and more. ## Key features - Roman numeral calculations - Roman fraction support - Convert Roman to Arabic and vice versa - Customizable backgrounds and button styles - Advanced functions (sin, cos, tan, sqrt, memory) - Landscape mode with expanded functions ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/roman-calculator/id415183786/reviews.md ### 5/5 — Cool!! *2014-12-15* A totally awesome/pointless app-but it is so much fun. (It's right up there with the virtual slide-rule apps) So now you can figure out those movie copyright dates on old movies and calculate how many years had elapsed between releases. Essential if you eschew all things Arabic. Impress your friends when you split a dinner check, "oh, you don't understand Roman Numerals......?" ### 5/5 — My main calculator app *2011-09-22* I don't understand the negative comment. I use the Roman Calc all the time and never had a crash. My background and button styles stay set from launch to launch. ### 1/5 — Hate it *2011-09-13* I hate this app don't get it when ever you use it more than once. It just takes u back to the main home page ### 5/5 — Fun!! Fun!! Fun!! *2011-03-28* This is not only a BLAST! But truly simple and useful. I really don't take the time to write comments, but this was just too good to let pass without letting others know about it. ### 5/5 — Great App *2011-02-11* The Roman Calculator is not just a novelty conversion app, but a real scientific calculator. It is also educational. I like the history given in the help screen. I never knew you could do fractions in roman numerals. Although the roman fractions round to the nearest 1/12 the Arabic values keep their actual values so your calculations are always correct. The graphics are great and high quality. No comparison with the other Roman Calculator apps available. Works on my ipod and ipad. Well worth the $0.99. ## Frequently asked questions about Roman Calculator ### What is the price of Roman Calculator? Roman Calculator is a paid app, priced at $0.99. This one-time purchase grants you access to all its features. ### Does Roman Calculator have ads? No, Roman Calculator is ad-free. You can use all its functionalities without any interruptions from advertisements. ### What devices is Roman Calculator compatible with? Roman Calculator is available for iPhone and iPad devices. It is designed to work seamlessly on Apple's mobile platforms. ### How often is Roman Calculator updated? The latest version, 26.2, was released on October 29, 2025. While specific update frequency isn't detailed, the app is actively maintained. ### What is the age rating for Roman Calculator? Roman Calculator has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals. ### What makes Roman Calculator unique? Roman Calculator is the first calculator to offer calculations with Roman fractions. It also provides a comprehensive set of standard and advanced mathematical functions. ### Can I customize the appearance of Roman Calculator? Yes, you can choose from four different backgrounds, including using images from your library. Additionally, there are four selectable button styles that can be changed in settings or with a swipe. ### What advanced functions are available in Roman Calculator? In landscape mode, Roman Calculator offers advanced functions such as sine, cosine, tangent, square root, inverse operations, and memory functions, alongside its Roman numeral capabilities. ## Version history (last 5 releases) ### 26.4 — 2026-05-23 Added haptic feedback for button press. ### 26.2 — 2025-10-29 Updated button design and animation. ### 26.1 — 2025-10-01 New App Icon ### 26.0 — 2025-09-20 Update for iOS26 and liquid glass ### 17.2 — 2024-12-31 Removed picture background Removed swipe to change settings Updated color background and updated marble buttons ## Apps similar to Roman Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [CONVERT UNITS](https://appshunter.io/ios/app/convert-units/id1114969241) | 4.7 (1,352) | Free | Productivity | | [Room Scanner: Floor Plan Maker](https://appshunter.io/ios/app/room-scanner-floor-plan-maker/id6504950381) | 3.3 (12) | Free | Productivity | | [Local Chat: Private AI Chatbot](https://appshunter.io/ios/app/local-chat-private-ai-chatbot/id6504043428) | 4.5 (56) | Free | Productivity | | [Notebook calculator (ge-calc)](https://appshunter.io/ios/app/notebook-calculator-ge-calc/id388632863) | 4.9 (49) | Free | Productivity | | [Greek Translator & More +](https://appshunter.io/ios/app/greek-translator-and-more-plus/id6742393543) | 4.8 (6) | Free | Productivity | | [Elephas: Secure AI for Files](https://appshunter.io/ios/app/elephas-secure-ai-for-files/id6444680023) | 2.5 (12) | Free | Productivity | ## More apps by John Millhouse - [iAggravation](https://appshunter.io/ios/app/iaggravation/id504344368) - [iKnockOut](https://appshunter.io/ios/app/iknockout/id541406859) - [iAggravation Lite](https://appshunter.io/ios/app/iaggravation-lite/id1161240063) - [iMuggins](https://appshunter.io/ios/app/imuggins/id1239184791) - [iTip-Well](https://appshunter.io/ios/app/itip-well/id1296407818) All apps by John Millhouse: https://appshunter.io/developer/415183789 --- *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 2026-09-04.*