Master Flash Cards is an educational application designed for Android that helps users memorize English vocabulary efficiently. Utilizing the forgetting curve principle developed by Hermann Ebbinghaus, it schedules word repetitions at optimal intervals to enhance long-term retention. Users simply indicate whether they remember a word, and the app automatically organizes future practice sessions based on their responses.

The application offers access to 10,000 English words categorized by difficulty levels, from beginner to advanced. These words represent the most frequently used in everyday conversation. Initially, a short test assesses the user's proficiency level, allowing for a tailored learning experience. Starting with the first 300 words enables users to comprehend approximately 65-70% of basic speech, while mastering 1,000 words raises this to 85-90%, ultimately achieving a vocabulary level comparable to that of a high school graduate.