Green Mountain Energy does not have a dedicated mobile application at this time. However, customers can conveniently manage their accounts and access various services through the Green Mountain Energy website. The website is designed to be user-friendly and can be easily navigated on mobile devices, allowing customers to view their energy usage, make payments, and access helpful resources. For the most up-to-date information regarding any potential app developments or other customer service options, it is recommended to check the current website. This will provide further insights into what Green Mountain Energy has to offer and any new features that may become available in the future.