Easily convert numbers between decimal, binary, hexadecimal, and octal systems. Supports conversion to and from any base.



239+ iOS apps curated and reviewed
Whether you're new to number system converter or looking for an upgrade, our curated collection of 239+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 1.0★ (1) | No | No | Aug 2026 | |
| 2 | Free | 4.8★ (2.1K) | No | Yes | Aug 2026 | |
| 3 | Free | 4.7★ (48K) | Yes | No | Aug 2026 | |
| 4 | Free | 1.0★ (1) | No | No | May 2026 | |
| 5 | Free | 3.7★ (3) | No | No | May 2026 | |
| 6 | Free | — | Yes | No | May 2026 | |
| 7 | Free | 1.0★ (3) | No | No | May 2026 | |
| 8 | $0.99 | — | No | No | Jun 2026 |



Easily convert numbers between decimal, binary, hexadecimal, and octal systems. Supports conversion to and from any base.



Easily convert numbers into their written word form and hear their pronunciation in multiple languages. Ideal for language learners or travelers needing to understand and communicate numerical figures accurately.





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 numbers between binary, decimal, and hexadecimal systems. This practical tool offers a fast and efficient way to handle your numbering system conversions.


Easily convert numbers between various formats including binary, octal, decimal, and hexadecimal. Supports custom base conversions up to base 16. Ideal for students and professionals needing quick number system transformations.




This utility app provides quick and easy conversions between various measurement units. It supports standard categories like length, area, volume, and weight, as well as specialized units for angle, speed, data storage, and currency for over 160 countries.


Easily convert numbers between bases from binary to base 36. Features a user-friendly design, real-time results, and a favorites list for quick access. Ideal for students, educators, and anyone working with number systems.


This app offers a comprehensive unit and hardness conversion tool with an easy-to-use interface. It includes currency conversion with updated exchange rates, over 300 engineering and scientific units, and a specialized hardness converter. Additional features like timezone conversion, pace calculation, and a standard calculator enhance its utility.


Easily convert numbers between various numeral systems, including bases 2-36 and historical systems like Roman and Japanese. Supports floating-point numbers for in-depth conversions.


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.


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.


Easily convert numbers between Decimal, Binary, Octal, and Hexadecimal bases. This utility app offers a straightforward interface for quick and accurate number base conversions.




Easily convert numbers between various bases, from binary to base 95. Supports common bases like decimal and hexadecimal. Offers a user-friendly interface for quick conversions.


This comprehensive tool offers over 14,000 conversion possibilities across 30 categories, providing precise calculations for students, scientists, and travelers. It features an educational layout, smart tooltips, and currency updates from trusted sources.


This app consolidates multiple conversion tools into a single, user-friendly interface. It offers a wide array of unit, time zone, and color code converters, along with an age and EMI calculator. Users can customize the layout and adjust conversion accuracy.


This free app offers lightning-fast unit and currency conversions with an ultra-sleek design. Easily convert essential units and currencies with just a few taps, making it a delightful and efficient tool for your iOS device.


This app offers a straightforward way to convert common measurements across various categories like length, weight, and temperature. It features a clean interface for quick input and instant, readable results, with options to swap units and view conversion history.


This app offers a comprehensive unit conversion experience with a vast database of over 1000 units across 50 categories. It supports mixed units, custom unit creation, and provides a unique, visually appealing interface for all your conversion needs.