Learn English Business is a free Android app developed by advmobile.us. This education and reference app aims to help people with office jobs improve their business English. The app contains 14 topics, 80 lessons, and over 500 audio files to practice with.

Each lesson consists of multiple sentences that users can click on to learn how to say them. The app is designed to be user-friendly, allowing users to easily find what they need by browsing through different subcategories. To improve their business English, users can repeat after the audio files provided.

Overall, Learn English Business is a useful app for those who want to improve their business English skills. With its easy-to-use interface and a wide range of lessons and audio files, users can easily learn and practice their language skills on-the-go.