Compare tools
Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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Language REACTOR
✓ verifiedFreemium
Browser extension that adds dual subtitles and click-to-lookup to Netflix and YouTube for learning languages.
1.7M visits/mo
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Deep English
✓ verifiedFreemium
Story-based English fluency program with free listening lessons and a paid live-practice membership with an AI voicebot.
355K visits/mo
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InterSub
✓ verifiedFreemium
Browser extension offering interactive dual subtitles and instant word translations for language learning while streaming.
100K visits/mo
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Lingotrack
✓ verifiedFreemium
Social tracker for language immersion that logs study time and media while surfacing level-appropriate content.
48K visits/mo
Pricing
No public pricing
No public pricing
Free trial available
Free: $0/mo
Pay-as-you-go: from $1.50
Premium: from $6/mo
Free trial available
Free: $0/mo (track one language)
Pro: $3/mo (unlimited languages)
Core features
- ✦Dual subtitles on Netflix and YouTube
- ✦Click-to-lookup word translations
- ✦Saveable vocabulary items
- ✦Playback controls for language study
- ✦Works as a browser extension
- ✦Story-based listening lessons
- ✦Shadowing practice for flow
- ✦AI chatbot/voicebot conversation practice
- ✦Pronunciation checking
- ✦Live small-group Zoom speaking sessions (members)
- ✦Spaced-repetition vocabulary
- ✦Interactive dual subtitles
- ✦Instant hover word translations
- ✦On-the-fly subtitle translation
- ✦Personal wordbook with Anki sync
- ✦Multi-platform (YouTube, Netflix, Coursera, etc.)
- ✦Phrase/idiom collocation detection
- ✦One-click activity and media logging
- ✦Crowdsourced, difficulty-rated content database
- ✦Progress dashboards and visualizations
- ✦Community leaderboards and reading challenges
- ✦AI-assisted logging and GPT integration
Use cases
- →Learn a language while watching shows
- →Look up and save new words from video
- →Study with dual subtitles
- →Improving English speaking fluency
- →Practicing conversation with AI
- →Building listening comprehension
- →Joining live speaking practice sessions
- →Learning a language via shows and courses
- →Looking up words while watching
- →Building and reviewing vocabulary
- →Tracking immersion hours and media consumed
- →Finding level-appropriate foreign content
- →Connecting and competing with other learners
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