ZAD Barreiras - Oficial is an Android app developed by Transitar Engenharia e Consultoria LTDA. It is a free utility and tool app that allows users to buy and activate the Digital Blue Card (CAD) for the use of Blue Zone parking spaces in the city of Barreiras, Bahia. The app is designed to make the process of purchasing and activating CADs as simple, convenient, and secure as possible. The app offers features such as a virtual wallet to check your CAD balance, multiple payment options, parking activation and renewal, and alerts to inform you when your parking time is about to expire. The app also provides a transparent history of your parking and credit purchases. Overall, ZAD Barreiras - Oficial is a user-friendly app that simplifies the process of managing your parking in Barreiras, Bahia.