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Language REACTOR logo
Language REACTOR
✓ verifiedFreemium

Browser extension that adds dual subtitles and click-to-lookup to Netflix and YouTube for learning languages.

1.7M visits/mo
Talkpal logo
Talkpal
✓ verifiedFreemium

AI language coach offering conversational practice with real-time feedback across 130+ languages.

1.5M visits/mo9.9K saves
MathGPT logo
MathGPT
✓ verifiedFreemium

AI math solver and tutor that adds animated video explanations for homework across math, physics and chemistry, for students.

3.6M visits/mo5.5K saves
Mathos AI logo
Mathos AI
✓ verifiedFreemium

AI math solver and tutor (Mathos) with photo solving, a real-time whiteboard tutor, PDF helper and study games, for students.

707K visits/mo18K saves
PDFToQuiz logo
PDFToQuiz
✓ verifiedFreemium

Generates auto-graded quizzes with explanations from uploaded PDFs or URLs, for students and teachers doing active-recall study.

20K visits/mo
Pricing

No public pricing

No public pricing

Free trial available

No public pricing

Free: $0
Basic: $2.99/week
Prime: $4.99/week
Free: $0 (1 quiz creation, 5-page PDF limit)
Pro: $8.99/month (unlimited quiz creations, 100-page PDF limit, 5GB uploads)
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
  • Conversational practice with AI tutors
  • Real-time personalized feedback and corrections
  • Dialogue, sentence, word, call, photo, and debate modes
  • Voice interaction with natural AI voices
  • Grammar courses and language certificates
  • 130+ languages on web, iOS, and Android
  • Step-by-step problem solutions
  • AI-generated animated video explanations
  • Interactive practice quizzes and tests
  • Coverage of math, physics, chemistry and accounting
  • Graphs and diagrams for complex problems
  • Mobile app
  • Photo, voice and text math solving
  • Real-time AI whiteboard tutor
  • PDF homework helper (parallel page solving)
  • Quizzes, flashcards and animated videos
  • Interactive games tied to concepts
  • iOS and Android apps
  • Uploads PDFs, DOCX, PPTX, URLs or typed text to build quizzes
  • Generates multiple question formats matched to the source content
  • Gives AI-written explanations for missed answers
  • Tracks quiz scores and progress across study sessions
  • Supports quiz generation in 40+ languages
  • Lets users chat with the uploaded document for direct Q&A
  • Exports quizzes to PDF, CSV or XLSX and shares via link
Use cases
  • Learn a language while watching shows
  • Look up and save new words from video
  • Study with dual subtitles
  • Self-learners practicing conversational fluency
  • Business teams training employees in new languages
  • Students supplementing classroom language education
  • Getting homework solved step by step
  • Watching video explanations of solutions
  • Practicing with generated quizzes
  • Preparing for exams
  • Solving and understanding math problems
  • Getting tutored while working on a whiteboard
  • Solving full worksheet PDFs at once
  • Studying with quizzes, flashcards and videos
  • Students self-testing on lecture notes or textbook chapters before exams
  • Teachers converting handouts into auto-graded classroom quizzes
  • Researchers turning papers into review questions
  • Trainers building assessments from onboarding or policy documents
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