OWO allows you to enable or disable subtitles, captions, and alternate audio for many TV shows and movies. You can see which movies and TV shows offer audio and subtitles in your preferred language.
To enable or disable subtitles or alternate audio on your iPhone, iPad, or iPod touch:
Launch the OWO app.
Select a TV show or movie.
While your TV show or movie is playing, tap anywhere on the screen.
Select the Dialog icon in the upper right corner.
Select your preferred audio or subtitle options.
Tap the X to continue watching.