A free program for Android, by WeRaven.

With English For You, you can improve your English skills without spending money on classes. The app contains video lectures for learning basic, elementary, and intermediate English — all created by experts to ensure credibility. 

Some of the videos are 40 to 60 minutes long, evoking the feeling of being in a classroom. After watching a video or two, be sure to take down notes and dedicate time for practice. On the other hand, English For You lets you change the theme and adjust settings.  

If you’re currently taking English-language classes, you may use the videos in English For You as supplementary learning materials.