Business English Presentation app for iPhone and iPad

Business English is an application for teaching the very subject.

Topic Presentation contains 15 topics that are presented in videos with a native speaker. After going through each topic, you take tests to check your knowledge of the subject. Tests take the form of multiple choice questions, filling in the gaps in the listening exercises, sorting words into the right categories and so on. The results then show you the tests you made mistakes in. Then you can take the tests again. The application also includes vocabulary for each topic and basic grammar.
Take the opportunity to learn English anytime and anywhere. You can download the videos direct to your telephone or tablet, which means you do not have to rely on having Internet connection the whole time and therefore you can study whenever you feel like it.