Typing the word builds muscle memory while the original line sits next to it. Phonetics, inflections, definitions and examples each toggle on or off, so you set the difficulty.
WatchRemember.
Turn the film you are already watching into your vocabulary list. Every word arrives with the line it was said in, the scene it came from, and the voice that said it — because nobody remembers a word list, they remember a moment.
Working out what you are on…
Three thousand words memorised, still lost in episode one
Because words on a list have nowhere to live. You learned what "reckon" means, but not the tone it was said in, the scene around it, or the rhythm of the sentence. Context is the hook memory hangs on.
Words come from what you watch
Drop in an MKV or a subtitle file. Every unfamiliar word is extracted, ranked by frequency, and turned into a deck that is yours alone.
Every word goes back to the film
Press Ctrl+1/2/3 while studying and the exact seconds the word appears play back. Sound, picture and context land together.
Review happens while you watch
The built-in player floats the words you are learning across the screen as danmaku, so revision costs no extra time.
One complete loop.
A/D jumps between captions, S repeats the line, and playback pauses after each one for shadowing. Hover any word to translate it, click to add it to a deck.
Every line of the film as a list. Loop any selection for shadowing practice, or transcribe captions by hand — writing sticks better than reading.
MKV video, standalone subtitle files, PDF and TXT documents all become decks. Decks from different sources link together, so one word collects every context it appeared in.
The best open-source scheduling algorithm available, fitted to your actual forgetting curve instead of fixed intervals. Decks export to Anki.
Hide the word, play only the audio, and find out whether you really know it. Hard and familiar words separate automatically.
Four steps
- 1
Pick something
A film you wanted to watch anyway, or a PDF you have to read.
- 2
Generate a deck
Drop it in. Under a minute later you have a deck with full context.
- 3
Study
Type it, read the line, hear it, replay the clip it came from.
- 4
Watch it back
Play the whole film in the app; the words you studied drift past as danmaku.
Nothing is uploaded
- Decks, study history and video files all live in ~/.OpenVZLingo on your own disk.
- No accounts, no personal data collected, no telemetry or analytics.
- The only network calls are the update check on launch (which you can turn off) and online pronunciation audio, if you choose it.
Builds are unsigned, so Windows SmartScreen and macOS Gatekeeper will warn once. Choose to continue.
Direct downloads are slow from mainland China. The mirror relays through gh-proxy.com, a third party — not through this site. Prefer the direct link if that matters to you.