In this app you can leanrn grammar and many other topics about English languages. It is unlocked version, so you will not have to pay anything but still have access to the full feature of the app and contents.
If you are a truly English language learner, i think you should keep this app in your phone because it will help you a lot along the way while you are learning English.
Learning grammar is important for all studetns of English lgnauge because grammar is very important and without grammar it is not possible for you to master English language. And if you want to write English contents professionly you also need to have good understanding of English grammar and its usage in academic writing.
Now you can download one of the best an droid app for free to learn English yet still free. If you want to get unlocked version apk, please hit download button below.