Duolingo is one of the best English language apps today and highly recommended for English beginners. The gamified learning system of the app helps you learn English quickly by spending twenty minutes a day. 

Memrise uses some creative and easy way to remember words for learning English. The focus of this app is to help the users expand their vocabulary by learning English words in a effective way. 

Busuu helps you learn English language on the go and the lesson's quality are guaranteed as it is based on CEFR language framework. Lessons range from beginner to advanced through comprehensive vocabulary, lesson dialogue, writing practice and tests.

Learn English Grammar is an interactive app that is designed to help improve your grammar. If you really like to improve your English grammar in a detailed way, it is an excellent English learning app that helps cover 12 grammar topics with 20 activities per topic for English learners of all levels

Babbel is a great language app that has a strong focus on vocabulary. Babbel also lets users learn to understand a language by completing and repeating phrases. The app has four different approaches - Sound Recognition, Picture Recognition, Spelling and Fill in the blanks. Babbel definitely focuses on the quality of your learning rather than the quantity.

http://www.educationalappstore.com/best-apps/5-best-apps-for-english-language-learners