Grammar Up: 1800 Questions is an educational application available for iPhone, developed by Webrich Software Limited. This app is tailored to mimic questions with a business focus commonly found in the TOEIC English proficiency test. With a full version offering 1800 questions across 20 categories, Grammar Up aids learners in enhancing grammar, word selection, and vocabulary. The app features a custom timer setting to improve response times under exam constraints and provides real-time error feedback for effective learning.

Users can prepare by topics, studying grammar rules categorized by various topics such as adjectives, adverbs, conjunctions, and more. The mixed test mode presents questions randomly from all topics for a comprehensive assessment. Detailed test results, progress tracking, and an intuitive interface make Grammar Up user-friendly and effective for learners of all levels.