CAT Vocabulary is a free Android app developed by Praveen Yuva, designed to help CAT exam aspirants improve their vocabulary. The app contains a list of over 4000 words with definitions and examples, along with tests, flashcards, high-frequency word lists, and favorite word lists. It also includes sections on synonyms, antonyms, one-word substitutions, idioms, phrases, and sentence correction.

The CAT verbal ability section is challenging to crack without sound knowledge of vocabulary. The app is a comprehensive vocabulary builder that can help aspirants prepare for the exam. The app features offline pronunciation, and users can add words to their mastered list if they are familiar with them. The navigation drawer makes it easy to go to specific word list categories.

The app's search functionality is intuitive, and users can search for words with ease. The app is not only helpful for CAT exam preparation but also for improving overall English vocabulary. Overall, CAT Vocabulary is an excellent app for CAT exam aspirants who want to improve their vocabulary and score high in the verbal section.