World Number Translator is an educational app designed to help users learn to say and spell numbers in different languages. Developed by David Richmond, this free app is available for iPhone users.

The app offers a unique "Odometer" style input, which allows users to easily count up and down by ones, tens, hundreds, and more. It also features a calculator-style input for convenience. Additionally, there is a fast-paced game that tests users' ability to recognize numbers and quickly input the corresponding digits.

World Number Translator is useful for a variety of purposes, including quick translation of numbers into spelled-out words, learning to count in another language, writing out numbers on checks, and practicing number translation. With support for over 50 languages, users can easily translate numbers and see the spelled-out versions.

For languages that do not use the Latin alphabet, the app also provides "latinized" spellings to aid in pronunciation. For example, the Chinese number 1,234 is spelled as "一千二百三十四" and the pronounceable version in pinyin is "yī qiān èr bǎi sān shí sì."

Overall, World Number Translator is a valuable tool for language learners and anyone interested in expanding their numerical vocabulary in different languages.