LingoBee is an Android app developed by HEID JSC. It is a free education and reference app that helps students learn and practice English vocabulary and grammar based on the English textbooks published by the Vietnam Education Publishing House. The app is designed based on the concept of the popular language-learning software, Duolingo.

With LingoBee, students can learn English effectively and efficiently. The app offers a wide range of exercises that cover various topics, such as grammar, vocabulary, listening, and speaking. Each lesson is designed to be interactive and engaging, making it easier for students to retain what they have learned.

In addition, LingoBee provides students with instant feedback and progress tracking, so they can monitor their learning progress and improve their skills over time. Overall, LingoBee is a useful app for anyone who wants to improve their English language skills, especially students who are studying English as a foreign language.