Trancy ET is a Safari extension designed for iPhone users that enhances language learning through AI-driven features. It provides bilingual subtitles for YouTube videos, enabling users to engage in sentence listening practice while enjoying their favorite content. This approach fosters an immersive learning environment, making it easier to grasp new languages.

In addition to YouTube support, Trancy ET offers comprehensive webpage translation services, including contextual and full text translation. Users can translate words and sentences with AI definitions, highlight new vocabulary, and access multiple translation engines for varied outputs. The application also includes pronunciation support for sentences, making it a versatile tool for enhancing language acquisition.