AI flashcards that turn note dumps and PDFs into addictive quiz sessions
AI flashcards that turn note dumps and PDFs into addictive quiz sessions
Flexi records 563 monthly visits with -84.9% month-over-month growth and Freemium pricing. Language Reactor records 1,878,769 monthly visits with +0.6% growth and Freemium pricing.

AI flashcards and spaced repetition for learning vocabulary that sticks
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | flexicards.app | languagereactor.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 563 (563) | 1.88M (1,878,769) |
| MoM Traffic Delta | -3.16K (-84.9%) | +10.73K (+0.6%) |
| Primary Market & Share | 🇺🇸 United States (100%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 172 | 1.45M |
| User Rating | 4.3 | 4.4 |
| Supported Platforms | Website | Website |

AI flashcards and spaced repetition for learning vocabulary that sticks
Enter a word or paste a list and Flexi suggests up to five cards with translations, examples, pronunciation and parts of speech.
A spaced repetition engine schedules each review just before you would forget, targeting long-term retention.
Hear words spoken and see pronunciation rendered in IPA, kana or pinyin across 20+ languages.
Bring your existing decks in from Anki, Quizlet or CSV files without rebuilding them by hand.
Learn languages from Netflix, YouTube, and real-world texts with dual subtitles and AI
View your target language together with a translation, pause, replay single lines, and jump back to the previous subtitle with a hotkey.
Hover or click any subtitle word to see definitions, part of speech, and pronunciation without leaving the video.
Automatically saves looked-up words and phrases, then quizzes you with the original context to build durable recall.
Bring the same translation and lookup workflow to ebooks, PDFs, articles, and other web pages.
AI flashcards that turn note dumps and PDFs into addictive quiz sessions
AI flashcards that turn note dumps and PDFs into addictive quiz sessions
Free AI flashcard and study tools for students
Free AI flashcard and study tools for students

Provides powerful bilingual translation across streaming video and web pages, though less focused on dedicated flashcard workflows.
Provides powerful bilingual translation across streaming video and web pages, though less focused on dedicated flashcard workflows.

Turn your notes into flashcards that stick
Turn your notes into flashcards that stick

SpecialistLearn a new language by talking to lifelike AI tutors
SpecialistLearn a new language by talking to lifelike AI tutors
AI-powered exam prep with question banks, mock tests and spaced-repetition flashcards for 10,000+ exams
AI-powered exam prep with question banks, mock tests and spaced-repetition flashcards for 10,000+ exams
Offers similar dual-subtitles and video translation for Netflix and YouTube, but with a more modern AI interface.
Offers similar dual-subtitles and video translation for Netflix and YouTube, but with a more modern AI interface.
Turn PDFs, slides, notes and videos into Anki flashcards with AI
Turn PDFs, slides, notes and videos into Anki flashcards with AI

SpecialistSpeak a new language from day one with human-like AI and expert human tutors
SpecialistSpeak a new language from day one with human-like AI and expert human tutors

AI flashcards that turn your notes into smarter study sessions
AI flashcards that turn your notes into smarter study sessions

Turn your lecture material into flashcards, quizzes and practice exams
Turn your lecture material into flashcards, quizzes and practice exams
Adds dual subtitles and interactive hover dictionaries directly to streaming video platforms, mimicking core Language Reactor features.
Adds dual subtitles and interactive hover dictionaries directly to streaming video platforms, mimicking core Language Reactor features.