188+ iOS apps curated and reviewed
The best roman numerals converter plus apps on iPhone average 4.8★ across 188+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
Easily convert between Roman and Arabic numerals with this intuitive tool. It helps decipher historical dates, resolve year-related disputes, and offers advanced features like a calculator and crossword solver. Customize your experience with keyboard preferences and large number display options.
Easily convert numbers to Roman numerals and vice versa. Supports values from 1 to 9999, making it a handy tool for educational purposes or quick reference.
This utility app allows for swift conversion between Roman numerals and standard Arabic numbers. It offers a straightforward interface for both input directions, making number system translation simple. Future updates are planned to expand its functionality.
Easily convert between Roman and Arabic numerals. Supports numbers up to 3,999,999 and validates Roman numeral input. Includes a conversion history and email sharing.
This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.
Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.
Easily convert between standard numbers and Roman numerals with a simple interface. This reliable tool offers quick conversions in both directions, making it a straightforward utility for any user. It supports multitasking on compatible devices.
This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.
Easily convert important dates into Roman numerals for special occasions like tattoos or anniversaries. The app automatically attempts to detect the correct date order.
Easily convert currencies with real-time exchange rates for over 150 global currencies, including cryptocurrencies. This app offers a simple interface and offline functionality, making it ideal for travelers. Exchange rates update automatically, and conversions happen as you type.
This app offers a comprehensive unit and currency converter with a vast array of categories and calculators for everyday needs. It allows users to customize templates, download shared ones, and provides automatic exchange rate updates for 167 world currencies.
This app offers a fast and intuitive way to convert between thousands of units and currencies. Simply type to search and select units, with automatic category detection and intelligent suggestions. It includes advanced features like a built-in calculator and bookmark organization.
Easily convert currencies with up-to-the-minute exchange rates. Ideal for travelers, it offers offline access, customizable rate modifications, and support for over 170 world currencies, including precious metals and Bitcoin. Features like home screen widgets and daily rate change tables enhance usability.
This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.
This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.
This app provides real-time exchange rates for all world currencies, including cryptocurrencies, and functions offline. It features an embedded calculator, the ability to set custom rates, and updates hourly. An optional premium version removes ads and offers additional features.
Master Roman numerals from 1 to 3999 with this educational tool. It features an intuitive learning mode to explore numeral systems and a quiz mode for testing comprehension with instant feedback. Learn anytime, anywhere, even offline.
Easily convert over 160 currencies and 350 physical units with real-time updates and offline capabilities. Create a favorites list for quick access to frequently used conversions and enjoy geo-based currency options. An ad-free version is available for purchase.