Yes, Diners Club International (Australia) does offer a mobile app that allows cardholders to conveniently manage their accounts. Through the app, users can access a variety of features designed to enhance their experience. These features typically include viewing account balances, tracking transactions, managing rewards, and making payments. The app is designed to provide a seamless experience, making it easier for members to stay on top of their finances while on the go. For further details on the app's availability and specific functionalities, it is advisable to check the official Diners Club website, where you can find up-to-date information and relevant resources regarding mobile account management.