SubX is a dual-subtitle media player designed for natural language learning on Android.

Play local videos & audio, online streams & podcasts — or cast to your TV — and learn directly from real content using your own subtitles, enhanced with repetition and translation tools.


🎬 Core Features

• Play Any Format – Supports MKV, MP4, AVI, MOV, M3U/M3U8, MP3, WAV, FLAC and more.

• Subtitle Format Support: Use SRT, WebVTT (VTT), LRC, and more with full support for video and audio playback.

• Dual Subtitles – View two subtitle tracks together to understand meaning in context and improve listening without pausing or leaving the video.

• Subtitle List View – Browse all subtitle lines in a clean, scrollable list for quick navigation and focused study.

• Subtitle Styling – Adjust subtitle font, color, size, timing, and position for perfect readability.

• Automatic Media Detection – SubX scans your device for videos, audio files, and subtitles to build your library instantly.

• Online Streaming – Stream videos from URLs with history, favorites, and renaming options.

• Gesture Controls – Swipe to seek, change brightness, or adjust volume easily.

• Keyboard Shortcuts – Full external keyboard support for fast playback and subtitle control.

• Background Playback – Keep listening even when your screen is off.

• Customizable Interface – Personalize your player layout, controls, gestures, and subtitles.

• Casting Support – Cast local and online videos to your TV with full subtitle control, including dual-subtitle support.

• Subtitle Gestures – Use pinch gestures to resize subtitles and vertical drag to reposition them on screen.

• Practice Mode (YouTube) – Learn through curated YouTube videos with dual subtitles for listening and shadowing, organized by level and topic.


💎 SubX+ Premium Features

• Subtitle Track Translation – Translate full subtitle files instantly. Offline covers 60+ languages; online offers unlimited language support.

• Seek by Subtitle – Jump, loop, and navigate scenes by subtitle lines across the player, casting controls, and system media controls.

• Auto Pause – Shadow naturally with automatic pauses at the end of each subtitle line.

• Auto Skip – Skip empty or silent lines for smoother learning flow.

• Auto Repeat – Repeat lines with customizable delay and loop count for better comprehension.

• Selectable Text – Tap any word or line to copy, translate, or save instantly.

• Anki Export – Create Anki flashcards from subtitle lines with optional audio from the exact timestamp.

• Ad-Free Experience – Enjoy distraction-free viewing and learning with zero ads anywhere in the app.


🧠 Why SubX?

SubX turns movies, shows, podcasts, lectures, and personal media files into a practical language learning environment. Learn directly from real content by watching, listening, repeating, translating, and saving phrases in context.

Unlike basic video players, SubX is built around subtitles as a learning tool. Dual subtitles, subtitle-aware navigation, shadowing, repetition, and file-level translation give you precise control over how you study without interrupting playback or leaving the content.

With SubX, you don’t just watch videos or listen to audio; you learn languages naturally. Improve your pronunciation, listening skills, comprehension, and vocabulary from real, native content.


⚠️ Important Note

SubX works with videos and audio that include subtitles, or with subtitle files you add separately.
It does not automatically generate subtitles from videos at this time.
This design ensures accuracy, full control, and a better learning experience for serious language learners.


🎯 Who SubX Is For

SubX is built for serious language learners who use real content and subtitles to practice shadowing, repetition, and comprehension.
It’s ideal for learners using movies, podcasts, audiobooks, YouTube videos, or their own media files.


⭐ Download SubX and start learning languages through subtitles on Android.