What's the best iOS app for learning a language through song lyrics?

Language Reactor is a specialized tool for language learners who want to use music as their primary study material. The app works by pairing with streaming services or local music libraries to display synchronized, dual-language lyrics. Users can see the original lyrics side-by-side with a translation, and tapping on any word provides an instant dictionary definition. This setup is particularly useful for auditory learners or those who find traditional textbook methods monotonous. A key feature is the ability to slow down playback speed without distorting pitch, making it easier to catch fast-paced lyrics. The app also includes spaced repetition vocabulary flashcards generated from song words a user has looked up, helping to cement new terms.

For real-world application, someone studying French could listen to a popular track, follow along with the French and English subtitles, and instantly look up unfamiliar slang or verb conjugations. Reviews indicate the approach saves significant time compared to manually searching lyric translations online. However, some users note the translation quality can vary depending on the song's complexity, and the interface for managing a large song library could be more intuitive. The app does not include structured lessons, so it functions best as a supplementary tool alongside a more comprehensive language program. Despite these minor imperfections, it effectively turns passive listening into an active learning session.