SubX Player: AI Dual Subtitles

A powerful media player that turns any video into a subtitle-based language lesson.

Watch your own videos, stream online, or cast to your TV—then use subtitles to learn naturally through real content. With built-in AI subtitle generation, even videos without subtitles become fully usable for learning.


Core Features

• AI Subtitle Generation: Generate subtitles directly on your device using Whisper and Moonshine. Choose between fast or accurate models. Works fully offline for complete privacy.

• Play Any Format: Supports nearly all video and audio formats, including MKV, MP4, MP3, and AVI.

• Subtitle Format Support: Supports SRT, WebVTT (VTT), LRC, and more, with full compatibility across video and audio playback.

• Dual Subtitles: View and compare two subtitle tracks for deeper understanding.

• Subtitle List: Browse all subtitle lines in a clean, scrollable list for easy navigation and focused study.

• Subtitle Styling: Customize font, size, color, and timing for perfect readability.

• Stream Online Videos: Stream from URLs with history, favorites, and rename options.

• Media Library: Search, sort, rename, and organize your local videos easily.

• Gesture Controls: Swipe to seek, pinch to zoom, or adjust brightness and volume.

• Background Mode: Keep listening even when the screen is off.

• Customizable UI & Settings: Personalize your playback experience fully.

• Casting Support: Cast local and online videos to your TV with full subtitle control, including dual subtitles.

• Subtitle Gestures: Resize and reposition subtitles with intuitive gestures.

• Practice Mode (YouTube): Learn with curated YouTube videos using dual subtitles, organized by level and topic.

• SubX Clip: Create short video clips from subtitle moments with burned-in text, ready for sharing.


SubX+ Premium Features

• Subtitle Translation: Translate subtitles into 130+ languages instantly.

• Seek by Subtitle: Jump between subtitle lines or repeat them for focused listening.

• Auto Pause: Automatically pause at each subtitle line for shadowing practice.

• Auto Skip: Skip silent or empty subtitle lines for smoother playback.

• Auto Repeat: Repeat subtitle lines with adjustable delay and repetitions.

• Selectable Text: Tap to copy or translate any subtitle line instantly.

• Share Subtitle Text & Audio: Share subtitle lines or extract audio clips from specific moments.

• Subtitle Editing: Edit text, fix timing, and save corrected subtitles.

• Subtitle Export: Export subtitles in SRT, VTT, TXT, or PDF formats.


Why SubX?

SubX combines a powerful media player with smart language learning tools.
Now you can generate subtitles for any video and turn it into a learning experience.

Watch, repeat, and understand real content—movies, podcasts, audiobooks, or your own files—while improving your listening and comprehension naturally.


Who SubX Is For

SubX is built for language learners who use real content to practice listening, repetition, and comprehension.
It’s ideal for movies, series, podcasts, audiobooks, YouTube videos, and personal media.


Download SubX and start learning languages through subtitles on your mobile and TV.