Gravity
Gravity is a mobile language-learning platform that turns native Japanese and Chinese videos, songs, and podcasts into interactive lessons. Users tap any word in a synced transcript to save it with its exact timestamp, then review those words as spaced-repetition flashcards with the original video clip. The app includes a curated, level-sorted library (JLPT N5–N1 for Japanese, HSK for Chinese) and requires zero setup.
- Education Technology
- Software Only
Funding
Founders
Founder details are not available yet.
Product
Problem
Traditional language-learning apps rely on artificial exercises and disconnected word lists that rarely match the vocabulary learners actually encounter in real native content. Learners who want to study through immersion must stitch together separate tools—a video player, a dictionary, a flashcard app—and manually build decks, which is time-consuming and often abandoned.
Solution
Gravity is a mobile app that turns any native video, song, or podcast into a structured lesson. Users watch content from a curated library of Japanese and Chinese media, and tap any unfamiliar word in a word-by-word synced transcript to save it with its exact timestamp. Saved words automatically become spaced-repetition flashcards that include the original video clip for replay, so learners review vocabulary in its authentic context. The platform requires no setup—there are no external dictionaries, decks, or browser extensions to configure—and everything happens in one place on the phone.
Target Audience
Primary users are self-directed Japanese and Mandarin Chinese learners, from beginners to advanced (N5–N1 / HSK levels), who want to study through real native content on their mobile phones rather than through gamified courses or manual flashcard systems.
Features
- Curated library of native Japanese content leveled from JLPT N5 to N1, and Chinese content leveled by HSK, including anime, C-dramas, music, vlogs, podcasts, and street interviews
- Word-by-word synced transcripts with tap-to-save functionality; Chinese content includes tone-marked pinyin above every word
- One-tap flashcard creation with the original video clip embedded in each card for contextual review
- Built-in spaced repetition system for reviewing saved words, with the ability to organize words into custom decks
- "Moments" feature providing short clips to swipe through for quick immersion sessions
- Available on iOS and Android with no setup or external tools required