In this paper, we examined users' behavior and perception in a mobile English learning application called "English Practice" (EP app). EP app has been placed on Google Play store over four years and has more than 800.000 installed. The study was conducted over two months from October 2015 to December 2015 through Google Analytic by drawing on random sample of 106,912 active users from 208 countries, especially 48,176 active users of ten countries included India, Philippine, Sudan, Turkey, US, Vietnam, Thailand, Pakistan, Malaysia and Egypt were analyzed. The results showed among top ten countries, India, Philippines and Malaysia seem the countries where users spent the longer duration per session as well as more screen views per session. Further understanding about English language status among top ten countries, English popularity inside domestic was likely one of the reasons to explain the difference. In addition, the similar trend found among ten countries in which Quiz function seems been visited mostly, followed by Chat-room and Flashcard. Grammar lessons were the less popular function. We suggested that simplify learning task and reducing the content presenting in each session might look more apparel to users of EP app.