PARROT is an Android application developed by TuanEnglish that helps users learn English vocabulary in the most efficient way possible. The app follows a researched vocabulary learning process that includes three steps. First, users can filter words into two categories: known and unknown. Second, users can choose to learn the unknown words through three types of exercises: guessing the word based on its definition, pronunciation, and image; practicing pronunciation; and writing the word. Third, users can test their knowledge with a variety of randomized questions.

PARROT includes numerous sets of vocabulary related to all fields of English, such as TOEIC, IELTS, general English, and specialized English. The app offers high-quality content that surpasses other English learning solutions by selecting and filtering vocabulary from various reputable sources.

Many users have reported that PARROT is addictive and fun to use. Instead of feeling like they are studying, users feel relaxed and entertained while using the app. PARROT's development team has successfully conveyed the message of "Learn while playing, play while learning."