A free app for Android, by MobiSystems.

What is Collins Cobuild? It is a dictionary app that gives you the most reliable and up-to-date vocabulary to help you improve your English language skills. We focus on all aspects of the English language: speaking, listening, reading, and writing. We are proud of our clear, user-friendly interface that provides a comprehensive, detailed, and easy-to-use experience. With over 650 million words, you will find all the words you need, and we make sure that they are clearly defined and explained in full sentences.

We understand that the first step to mastering any language is to learn its vocabulary. That is why our app will help you improve your vocabulary and make you a better English speaker.

Our app will be your best friend and guide to the English language. We will help you find the words that you are looking for and ensure that they are clearly defined in full sentences.

The app is also designed to help you improve your reading and writing skills. We provide a detailed explanation of every word, and our examples and thesaurus will help you to improve your vocabulary and understand the meaning of the word better.