At N2, you are done with "learner content". You want raw anime in 1080p, played from local files on your hard drive. But browser extensions like Language Reactor are built for streaming, not local immersion. They struggle with MKV files, fail to load extensive subtitle tracks, and often desync audio when you try to mine sentences.

The Solution: A Native Desktop App. SubSmith is not a chrome extension. It is a full-featured video player that natively supports MKV, MP4, and AVI files. It renders stylized ASS subtitles perfectly (something browsers still cannot do well) and gives you exact frame-by-frame control for audio slicing.

Feature Spotlight: Zero-Friction Mining. When you hear a sentence you want to learn, just pause and click. SubSmith automatically extracts the subtitle text, slices the audio perfectly to the dialog timing, and sends it all to Anki. No "recording system audio." No "cropping screenshots." It just works, letting you stay in the flow of the story.

Why "Offline" Matters for N2: Serious learners build archives. You download seasons of anime to ensure you always have material. SubSmith works completely offline, meaning you can immerse on a plane, on a train, or when your internet is down. Your progress never stops buffering.