macOS & Windows
Learn a language from the films and shows
you actually want to watch
Load your own video and subtitle files in any of seven languages, tap any line for an instant AI grammar and vocabulary breakdown, then loop the tricky ones until they stick.
Free analyses are for waitlist members. Takes a few seconds.
The transcript sits beside the video: the spoken line highlights as it plays, and every line has its own AI and loop buttons.
Features
Built for real subtitle files, not a curated library
No streaming catalog, no lock-in — just your own files, analyzed properly.
Your own video, your own subtitles
Open any local video file and a matching .srt or .ass subtitle in English, Español, 日本語, 한국어, 简体中文, Français and Deutsch — no upload, nothing leaves your computer except the sentence you ask AI about.
Per-sentence AI analysis
Tap the AI button on any line for a grammar and vocabulary breakdown, explained in your own language and cached so you never pay to re-analyze the same sentence twice.
A-B loop for listening practice
Loop a whole range or just one line, on repeat, for as long as you need it to click — built for drilling the exact phrase that gave you trouble.
Handles messy real-world files
Bilingual subtitle tracks, unusual encodings, timing that drifts against your release — a timing-offset control fixes sync in seconds. Tell it which language you're studying and which to explain in; it remembers both.
How it works
Three steps, no setup
Open a video + subtitle
Drag a video file in, or pick one from Settings. Load a matching .srt/.ass to populate the transcript.
Tap any line for AI analysis
Get grammar and vocabulary explained in your own language, right next to the transcript.
Loop it until it sticks
Set an A-B loop on the whole scene or a single sentence, and repeat as many times as you need.
Get the player
Windows and macOS, direct download
No app store, no review wait — just download and open it.
Watching on YouTube instead? The Chrome extension does the same thing there, on the same account.