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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Astra AI
✓ verifiedFreemium
AI tutor for school and university subjects with step-by-step help, exam prep, oral/mock exams and flashcards.
4.4M visits/mo1.7K saves
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Coddy - Code Makes Perfect
✓ verifiedFreemium
Gamified platform to learn 20+ programming languages via interactive lessons, a browser playground and an AI tutor.
2.5M visits/mo2.0K saves
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SHIFT AI
✓ verifiedPaid
Japanese-language membership community teaching professionals and side-hustlers how to apply generative AI to their work.
1.2M visits/mo
Pricing
No public pricing
No public pricing
Free trial available
No public pricing
No public pricing
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
- ✦Step-by-step subject explanations
- ✦Photo-based math problem solving
- ✦Oral and mock exam practice with grading
- ✦Personalized study plans
- ✦Flashcards from uploaded notes
- ✦Coverage of many subjects, user-created subjects
- ✦Interactive lessons in 20+ languages
- ✦Browser playground to run code with no setup
- ✦AI tutor that explains and debugs code
- ✦Shareable completion certifications
- ✦Cheat sheets, docs and developer tools
- ✦Team/business training option
- ✦110+ video courses across AI-tool, automation, and business topics
- ✦live webinars from invited AI practitioners
- ✦in-person regional networking events
- ✦free one-on-one career/AI consultation
- ✦corporate AI upskilling program for companies
- ✦member success-story interviews and community leaderboard
Use cases
- →Learn a language while watching shows
- →Look up and save new words from video
- →Study with dual subtitles
- →Prepare for school or university exams
- →Get help understanding tough concepts
- →Practice oral exams out loud
- →Study from your own notes
- →Learning to code from scratch
- →Practicing a new programming language
- →Getting instant AI help while coding
- →Earning certificates to share
- →Onboarding and training engineering teams
- →learning to use generative AI tools for daily work
- →exploring AI-related side income or career change
- →corporate AI adoption training for employees
- →networking with other AI learners across Japan
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