Dicode is a free dictionary app from Nuagic SAS, designed to help people explore language and knowledge at different levels, from primary school to doctoral study. It brings together nine dictionaries covering general French, law and legal terminology, artificial intelligence, geography, Latin, Ancient Greek, philosophy, history, and French spelling. The website lists 587,947 entries, with definitions adapted to different levels of complexity; in the general French dictionary, users can choose among seven levels.

The app offers browsable entries, instant search, interactive word links, and quizzes across subjects, with 240,592 questions in total. Users can also track their learning through spaced repetition, daily goals, streaks, and badges. Comfort features include adjustable text size and day and night themes.

Dicode is available for iOS and Android, and its content works offline without an internet connection. The service is offered without charge, advertising, or tracking. Its content is produced using AI models and open sources, then checked through automated verification, with certain factual datasets supplied independently