Apps similar to Language Reactor include Linglass, which has a free version. Other options are DoubleSubs, Subtify Studio, EasySubs and Live Subtitles. There's no shortage of Language Learning Tools like Language Reactor, with more than 25 alternatives for the web, Mac, iPhone, iPad and Windows.
Verbally is a browser extension for intermediate language learners who want to learn from real content, not just apps like Duolingo. It reads any web page aloud in the original language and shows a translated caption in sync, so you listen in the language you're learning and...
Language learning app that helps adults learn through adapted books with instant translation, native audio, and vocabulary flashcards.
Gravity is a Japanese immersion app for iPhone, iPad and Android. It gives you a hand-picked library of real Japanese videos (anime clips, YouTube vlogs, podcasts and music), each levelled from Pre-JLPT to N1, so you can find something you mostly understand and press play.
Canada
Bilingual Subtitles for the Netflix Web App. An actively maintained fork with various bug fixes and improvements to the original NflxMultiSubs.
Chrome extension and web app capturing clicked words from YouTube subtitles or web pages as flashcards, each including offline dictionary definitions, IPA pronunciation, sentence context, calculated difficulty, auto-generated images, and browser-based spaced repetition review on any device.
South Korea
Local Migaku-style flashcard miner — learn languages from video. Word-by-word subtitles, one-click Anki cards, 100% offline.
Chile
Browser extension that dubs YouTube, Udemy, Coursera and other videos into your language in real time with natural AI voices.
Chrome extension for learning languages on Netflix. Display two subtitle languages at the same time. Rewind by a few seconds. Rewind to the beginning of phrases. Pause at the end of phrases. Bookmark words and the phrases. etc.
A vocabulary app for people who already speak English: it builds your personal word list from the shows and videos you watch, finds the words you don't know, and helps you learn them in context.
LingoShade is a browser-based practice tool for language learners who do fine with textbooks but struggle to keep up with real speech. It combines three exercises on the same short text at your level (A1–C2):
Poland
EU
SubSmith is a private desktop application designed for language learners. It allows you to generate editable, timestamped subtitles and transcripts from any video or audio file directly on your computer.
