01 · Understand
Reveal only the help you need.
Keep the original subtitle visible, blur or hide the translation, and reveal it when the line is genuinely difficult.
Learn with the videos you choose
Turn real videos into active language practice.
Control dual subtitles, replay the exact phrase you missed, understand words in context and review the vocabulary worth keeping.
Android phone and tablet. Premium accounts can link the Android TV app.
Dual subtitlesOriginal and translation controlled separately.
Phrase controlReplay and optional auto-pause.
Contextual dictionaryUnderstand the word without leaving the scene.
Vocabulary reviewSave useful words and revisit them later.
See the learning loop
From watching to understanding in one flow.
DualSub keeps the learning tools close to the video, so a difficult phrase becomes something you can replay, inspect and remember.
02 · Inspect
Understand a word in its actual context.
Press a subtitle word to open the contextual dictionary. Save the useful ones and continue the video without changing apps.
03 · Replay
Listen again. Move on when you are ready.
Use phrase controls and optional automatic pauses to work through fast dialogue without losing your place.
Bring your own compatible source
One study workflow across the videos you already choose.
Search or open compatible videos and use DualSub's learning controls around the player.
Load a video from your device, select available tracks and study with dual subtitles.
Open links intentionally sent by another app. DualSub acts as the player, not as a content catalogue.
Premium on Android TV
Take dual subtitles to the big screen.
Link the TV app to a DualSub Premium account. The phone remains available as a companion for subtitle control and vocabulary lookup.
Clear expectations
What DualSub does and does not provide.
Does DualSub provide movies, series or streams?
No. DualSub does not provide a media catalogue, streams, movies, series, addons or subtitle files. Users choose a compatible YouTube video, local file or external playback link.
Will every YouTube video work?
No. Playback and subtitle availability depend on the video owner and YouTube. DualSub reports when a video cannot be embedded or when usable subtitle tracks are unavailable.
Is automatic pause mandatory?
No. Auto-pause is optional. You can watch continuously, repeat one phrase or navigate between subtitle segments when those controls are available.
What does Premium add?
Premium includes eligible cloud-assisted features and the ability to link the Android TV companion app. The exact offer is shown in the Android app before purchase.
Watch less passively.
Learn more deliberately.
Try the first learning loop on Android and decide whether DualSub fits the way you already watch videos.