Oxford A-Z of English Usage is a free Android application developed by MobiSystems that provides a comprehensive guide to proper English usage and grammar. It contains all the essential information you need to know about usage and correct English, making it an indispensable tool for writers, speakers, and language enthusiasts. The app features entries on common issues of uncertainty and confusion, all presented in a handy A-Z sequence. It also offers more than 20 feature articles on specific subjects such as hyphenation or Latin plurals.

This app is based on Oxford's world-leading dictionary research and contemporary language monitoring, ensuring that all the information provided is accurate and reliable. Moreover, the app's advanced search and language tools make it easy for users to find the words and phrases they need. With the Tap to Translate feature, users can even search for words in any other Android app. The app comes with four colorful new themes, making it not only informative but also visually appealing.