English Grammar - Preposition is a free mobile application that helps users learn prepositions in a fun and interactive way. Developed by engsoft.tc, this app is perfect for those studying for TOEFL, IELTS, TOEIC, SAT, GMAT, GRE and HKDSE exams.

The app offers comprehensive lessons with translations that include 300+ sample sentences and common mistakes with Chinese translations. It also features an interesting quiz game with 1000+ multiple-choice questions in its question bank. As users answer more questions correctly, the app intelligently generates more difficult questions. Users can use the 50:50 feature to eliminate half of the incorrect choices. The app also has 4 game modes: Answering 20, 50 or 100 questions and Sudden Death Mode.

The app provides detailed test results, including which questions were answered incorrectly, the score, max combo, date and time of the test. It also shows the top 30 frequent mistake questions, making it useful for revision and challenging friends. The app's convenient search feature allows users to easily search through 1000+ preposition usage with Chinese translation. Written by experienced English teachers, the app does not require an internet connection.