DARB is a free mobile application developed by Abu Dhabi Integrated Transport Centre for Android 5.1. It provides a set of services and features that enable the user to manage their vehicles' transactions under Abu Dhabi Tolling Gantries through the app. The app offers new user registration, vehicle registration, balance charging and payment of fees, traffic statistics, violation details, grievance or exemption submission, traffic gantries location on the map, and account management services.

With DARB, users can manage their accounts directly from their mobile devices without having to visit the website. The app is easy to use and provides a convenient way for users to access all the services related to their transactions. The traffic gantries location feature is particularly useful for users who want to plan their routes and avoid toll roads. Overall, DARB is a reliable and efficient app that simplifies the process of managing tolling transactions in Abu Dhabi.