Manual de Redação is an Android app developed by Chelin Apps that aims to standardize and uniformize language by providing a comprehensive guide for writing. The app includes information on various types of textual writing, such as personal letters, narration, and more. It also covers aspects of denotation and connotation, grammar rules, and spelling.

One of the highlights of this app is its focus on concordance and the use of abbreviations. The app is based on the official Manual de Redação and is an excellent resource for students and anyone looking to improve their writing skills. It is available for free and is an essential tool for anyone who wants to write effectively and efficiently.