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BurningVocabulary - Touch and highlight YouTube & Netflix subtitles
Reji - Improve your vocabulary hassle-free 📚
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Synonymful - Improve your vocabulary and communicate like a pro.
Vocly - Learn vocabulary in 50 languages with fun games