I found this nice infographic made by Karenne Joy Sylvester in her blog Kalinago English. Read her post here....
She analyzed 40 different Android apps for language learning and ended up recommending these 6 for English language learning:
English in a Month
Learn English in pictures
MyWordBook (British Council)
Test Your English Vocabulary
Laura Davis is an entrepreneur and educator. Her background covers teaching, school management, and community development work.