Yes, Telstra offers a mobile application known as the Telstra app, which allows users to conveniently manage their accounts. This app provides various features, enabling customers to view their current account balance, pay bills, and monitor usage for services such as data, calls, and messages. Additionally, it offers options for managing mobile and broadband plans, including the ability to add or remove services and update personal information. Users can also access customer support and relevant service information directly from the app. The Telstra app is available for download on both iOS and Android devices through their respective app stores. For more detailed information about the features and how to get started, it might be useful to check the official Telstra website.