A free app for Android, by LinDuo.

LinDuo is the easiest way to learn English in just 10 minutes a day!

ADVANTAGES OF OUR APP:

• It is adapted to everyone. It is suitable for teenagers, adults, and even the elderly.
• Our app allows you to complete your English learning process at your own pace.
• You can set your own pace. We will not make you go through all the lessons at once. 
• We have only the most useful words, which are broken down into 180 thematic lessons.
• The application is designed so that it takes no more than one minute of your time to complete a lesson.

This app features special illustrations for visual learning. Moreover, it has audio recordings so that you can listen to how a word is properly pronounced.