SubX Player
Watch movies, series, anime, podcasts, YouTube videos, and your own media with dual subtitles, AI-generated subtitles, translation, and advanced playback controls.
Watch normally. Learn whenever you want.
Product
A video player first. Dual subtitles, AI generation, practice, and Anki sit on the same subtitle layer — so you can understand more without leaving playback.
Watch on YouTube if the player does not load.
Read the original line and its translation together. Offline translation and sync keep bilingual subtitles usable on the videos you already watch.
Create subtitles when a track is missing or wrong. On-device Whisper and Moonshine transcribe supported audio without uploading your media.
Jump to a line, repeat it, listen again, and shadow native audio. A subtitle line becomes the unit of practice.
Save useful sentences from authentic dialogue and export them to Anki on Android, or share text and audio on iOS.
Reviews
Genuine reviews from the App Store and Google Play — from everyday watchers and language learners.
“Great app! Super convenient for language learning — being able to jump between subtitles and repeat lines makes a huge difference. Very useful features. Highly recommended!”
“I use this app to learn a foreign language. It's easy to toggle the subtitle on/off so I can train my listening and check words anytime I want. Easy to use and very useful tool.”
“It can be one of the best apps for all users — as a fantastic video and audio player at the same level as MX Pro or mpv players.”
“Honestly, SubX is one of the most underrated video players I've found. I mainly use it for English-dubbed anime, and its AI-generated subtitles are extremely useful when the available subtitles don't match the actual audio. The dual subtitle feature is also amazing—you can watch with two different languages at the same time, which makes it useful for learning a new language through movies, anime, and other videos. I genuinely think this app deserves much more popularity!”
The idea
SubX works as a normal media player first. Subtitles are not an overlay you tolerate — they are the layer that adds dual languages, translation, generation, practice, and memory when you want them.
Watch normally. Learn whenever you want.
How it works
Use SubX as your everyday video player — or turn the videos you already watch into language-learning material whenever you want.
01 — Watch
Play local files, browse folders, build playlists, stream via M3U/M3U8, keep audio going in the background, use picture-in-picture, and cast to a TV. Subtitle customization stays in the player, not in a separate app.
02 — Understand
Put two languages on screen. Translate tracks offline, fix timing when a file drifts, and keep bilingual subtitles aligned with what you hear — useful for movies, TV, and anime where official tracks or fan subs don’t match the audio.
03 — Practice
When a line deserves a closer look, seek to it, replay it, loop it, and shadow it. Listening practice stays inside the player instead of a separate drill app.
04 — Remember
Capture useful sentences from the movies, shows, and files you already watch. Export to Anki with optional audio on Android, or share subtitle text and audio on iOS — vocabulary tied to scenes you understand.
Features
Capabilities grouped the way you actually use video — playback, subtitles, AI and translation, language learning, and advanced tools.
Play MKV, MP4, AVI, MOV, MP3, FLAC, and stream via M3U/M3U8. Your own library — not locked to one platform.
Browse local video libraries by folder and build playlists for series, courses, or listening sessions.
Keep listening with the screen off, use picture-in-picture, or cast to a TV while keeping subtitle controls on your phone.
Two languages on screen at once to follow foreign-language movies and shows — and connect meaning when you want to learn.
Fix timing when tracks drift, adjust appearance, and keep subtitles readable as a first-class part of playback.
Edit timing and text, then export corrected subtitles in SRT, VTT, TXT, or PDF (export with SubX+).
When tracks are missing or wrong, generate subtitles from the actual audio using OpenAI Whisper and Moonshine (supported languages and models). Free includes a standard model; SubX+ adds high-accuracy models for English, Korean, Japanese, Spanish, French, German, and Arabic.
Translate subtitle tracks on-device into 60+ languages free. SubX+ expands to 130+ languages.
Jump between subtitle lines to replay a difficult passage — spend time on the dialogue, not the timeline (SubX+).
Playback pauses at each subtitle line so you can repeat out loud before moving on (SubX+).
Loop a subtitle line with adjustable count and delay until sounds and words become familiar (SubX+).
Capture useful lines. On Android, export to Anki with optional audio. On iOS, share subtitle text and audio (SubX+).
Curated YouTube videos by level and topic if you want a starting point. Your own content remains the main experience.
The playback controls you expect from a serious media player — brightness, volume, seek — without leaving the video.
MKV, MP4, AVI, MOV, MP3, FLAC, and M3U/M3U8 — movies, TV shows, anime, podcasts, and local video files.
Android: direct Anki flashcards with optional audio clips. iOS: share subtitle text and audio to your study workflow.
Content
Your own movies, TV series, anime, podcasts, audiobooks, local files, and streams — not only curated educational content. Supported videos in supported languages can become learning material.
Foreign-language films and series with dual subtitles and translation.
Generate subtitles from the actual audio when dubs or fan subs don’t match.
Optional Practice Mode videos by level and topic, if you want a starting point.
Background audio with the screen off — and subtitles when you want the words.
Listen as audio, or generate subtitles for supported titles and languages.
Folders, playlists, and offline libraries on Android and iOS.
Language learning
SubX is not a language course. When something in a scene catches your attention, optional workflows on the subtitle layer help you move from watching to practice — on your terms.
Dual subtitles and instant line replay keep dialogue understandable while still challenging — stay in context and absorb patterns from real speech.
Toggle subtitles, replay a line, and loop audio until sounds become familiar. Ear training happens on the videos you already chose.
Auto-pause and repeat let you speak along with native audio in short subtitle-sized chunks — pronunciation practice when you choose.
Auto-repeat a subtitle line with adjustable count and delay. The line, not the whole scene, is the unit you work on.
Pull useful sentences from authentic movies, TV, anime, and local files instead of made-for-learner scripts.
Export mined lines to Anki with audio on Android, or share text and audio on iOS — vocabulary tied to scenes you already understand.
Comparison
| Feature | General Players VLC · MX Player · mpv |
Browser Extensions Language Reactor · Migaku |
Streaming & YouTube Netflix · YouTube |
SubX Player Android & iOS |
|---|---|---|---|---|
| Everyday Playback | ||||
| Local file playback MKV, MP4, AVI, MOV, MP3, FLAC | Full format support; no subtitle learning layer |
Browser and platform only; no local files |
No local file support |
Full formats with subtitle and learning tools active |
| Folders, playlists, and gestures Library organization and playback controls | Strong on desktop; varies on mobile |
Not a standalone media library player |
Platform playlists only |
Folders, playlists, and gesture controls |
| Picture-in-picture Watch while using other apps | OS-dependent |
Browser tab required |
Limited or platform-specific |
PIP with subtitle controls |
| Streaming via M3U/M3U8 Any IPTV or HTTP stream | VLC supports it; no learning mode |
Browser tabs only |
Platform-specific streams only |
M3U/M3U8 with full subtitle tools |
| Background audio Continue listening with screen off | OS-dependent; inconsistent on mobile |
Active browser tab required |
YouTube Premium only |
Screen-off audio for podcasts and audiobooks |
| Cast to TV Mirror to TV with subtitle control | Possible with workarounds |
No casting support |
Native but no learning controls on phone |
Cast and keep subtitle controls on phone |
| Subtitle Intelligence | ||||
| Offline AI subtitle generation Generate subtitles from audio on supported content | No AI tools at all |
Cloud-only; local files not supported |
Pre-made tracks only; cloud-dependent |
On-device Whisper and Moonshine; media not uploaded |
| Bilingual dual subtitles Native + target language side by side | Two SRT files; manual load, no translation |
Netflix and YouTube only; not local files |
Auto-translate only; limited accuracy |
On any content; offline; 60+ languages free |
| Offline subtitle translation Translate subtitle tracks locally | None |
Cloud translation; internet required |
Online-only; limited language pairs |
60+ languages offline; 130+ with SubX+ |
| Subtitle editing and export Fix timing and text; save to file | Load only; no in-app editing |
Copy single lines only; no full editor |
No access to subtitle data |
Edit timing and text; export SRT, VTT, TXT, and PDF |
| Seek by subtitle Jump to any line without scrubbing | Timeline scrubbing only |
Streaming and YouTube only |
No subtitle-level navigation |
Jump to any line on all content (SubX+) |
| Learning Workflows | ||||
| Shadowing and auto-pause Pause at every line for speaking practice | Manual pausing only |
Basic loop; no dedicated shadowing flow |
No shadowing tools |
Auto-pause at subtitle lines (SubX+) |
| Auto-repeat and line looping Loop a line with count and delay | A-B loop in VLC; not subtitle-synced |
Platform-locked; no delay control |
No line looping |
Subtitle-synced, adjustable count and delay (SubX+) |
| Sentence mining Capture vocabulary from real content | None |
Strong, but streaming platforms only |
Closed ecosystems |
Any source: local files, streaming links, YouTube |
| Anki export with audio Flashcard export with subtitle clips | None |
Streaming-locked; no local file support |
None |
Android direct Anki and audio clip; iOS share text and audio |
| Your own content library Learn from media you already have | Plays your files; no learning layer |
Tied to Netflix, YouTube, and browser |
Platform catalog only |
Your files, folders, and streams — not a curated library |
| Content Freedom | ||||
| Works across content sources Local files, streams, and platform video | Local and streams; no subtitle learning |
Specific platforms only |
Single ecosystem |
Local files, M3U/M3U8, and more with full tools |
Privacy
Technical accuracy matters more than slogans. SubX processes supported subtitle workflows on-device. Some features still depend on the network — because of the content source, or because a model is not available locally.
Subtitle generation uses on-device transcription models including OpenAI Whisper and Moonshine for supported languages and models. Your media files are not uploaded to generate those subtitles.
Core playback works offline. For supported workflows, subtitle generation and translation also run on-device. Some features may require an internet connection depending on content source and model availability.
Local video and audio you play, and on-device subtitle generation and translation from that media, are processed on your device — not as a cloud upload for those workflows.
Not every feature is offline. Streaming, optional Practice Mode YouTube videos, store downloads, and some model availability still need a connection. See the privacy policy for data the app may collect in general use.
FAQ
What SubX is, how dual subtitles and AI generation work, and where the free player ends and SubX+ begins.
SubX Player is a full-featured video player with first-class subtitles and language-learning tools. Play movies, shows, anime, local files, and streams with broad playback support, then use dual subtitles, translation, AI-generated subtitles, repetition, shadowing, and sentence mining when you want to go beyond watching — without switching apps.
Both — and both are first-class. SubX is a capable everyday video player with serious subtitle tools and meaningful language-learning workflows built into the same experience. It is not a language course, and it is not a generic player with learning features bolted on.
Yes. Dual subtitles put two languages on screen at once so you can follow foreign-language movies and shows without losing context, and connect meaning to unfamiliar words when you want to learn. Offline subtitle translation into 60+ languages is included free; SubX+ expands to 130+ languages.
Yes. When subtitles are missing or don't match the audio, SubX can generate them on your device using on-device transcription models including OpenAI Whisper and Moonshine (for supported languages and models).
Yes. SubX can translate subtitle tracks on-device. Offline subtitle translation into 60+ languages is included free; SubX+ expands to 130+ languages.
Core playback works offline. For supported workflows, subtitle generation and translation also run on-device without uploading your media. Some features may require an internet connection depending on content source and model availability.
Offline subtitle translation covers 60+ languages free and 130+ with SubX+. On-device subtitle generation uses OpenAI Whisper and Moonshine for supported languages and models. SubX+ adds high-accuracy models for English, Korean, Japanese, Spanish, French, German, and Arabic. The app UI is available in 30+ languages.
Yes. SubX supports local video and audio files (MKV, MP4, AVI, MOV, MP3, FLAC), folders, playlists, and URL streaming via M3U/M3U8 — your own library, not a locked catalog.
Practice Mode offers optional curated YouTube videos by level and topic if you want a starting point. Your own movies, TV series, anime, podcasts, audiobooks, local files, and streams remain the main experience.
SubX+ expands advanced capability: high-accuracy AI subtitle models for English, Korean, Japanese, Spanish, French, German, and Arabic; translation into 130+ languages; seek-by-subtitle; auto-pause and auto-repeat; sentence mining and subtitle export; and an ad-free experience. The free app remains a full video player with core playback, dual subtitles, standard on-device generation, and 60+ language translation.
Yes. SubX Player is available on Android and iOS. Anki export with optional audio clips is available on Android; on iOS you can share subtitle text and audio to your preferred study workflow.
Use SubX as your everyday video player, then turn the videos you already watch into language-learning material when you want. Dual subtitles and translation help you understand; seek-by-subtitle, auto-pause, auto-repeat, and shadowing support listening practice; sentence mining and Anki export help you remember useful lines from authentic content.
Android & iOS
Download SubX Player — a full-featured video player with first-class subtitles and language-learning tools. Free on Android and iOS.
