CNA - Cadastro Nacional de Adv is a free Android application developed by Conselho Federal da OAB. The app serves as a tool that allows users to access information about registered lawyers and interns in the OAB registry. With this app, users can easily search for lawyers and interns by name or registration number and access their contact information.

The app is user-friendly and easy to navigate. The search function is quick and efficient, making it easy to find the information you need. The app also allows users to save their favorite lawyers and interns for easy access in the future. The app is a great resource for anyone looking for legal services or information about registered lawyers and interns in the OAB registry.