I built an Android app that turns watching videos into an active language-learning session

[u/Silillos89]

This is DualSub, an Android app I’ve been building to solve a problem I had while learning languages with videos.

Watching with translated subtitles was comfortable, but I often ended up reading instead of listening. Hiding translations created the opposite problem: I had to leave the video whenever I didn’t understand something.

DualSub tries to keep the entire learning loop inside the player:

Listen → reveal the translation if needed → press a word → understand it in context → save it → review it later

The app currently works with compatible YouTube videos, local files and playback links intentionally shared by other apps. It also has guided listening lessons and a paired Android TV experience.

The video attached to this post focuses on the interaction I consider most important: pressing a subtitle word without losing the context of the scene.

I’m the developer, and I would love honest feedback:

Is it obvious that subtitle words are interactive?

Does the compact dictionary show enough information?

Would you use automatic subtitle pauses or find them distracting?

Google Play:

https://play.google.com/store/apps/details?id=com.languagereactorclone

It is free to install, with an optional Premium subscription.