TDM Messenger is a free Android-based corporate instant messaging app developed by Информационный город ГКУ. Designed for internal communication, the app requires employee registration to get started. TDM Messenger offers personal and group chat options along with a file-sharing feature.

The app provides a quick and easy way for employees to communicate with each other, share files and collaborate more effectively. The interface is user-friendly, and the app is easy to navigate. The personal and group chat options allow employees to communicate seamlessly while the file-sharing feature helps to streamline work processes. Overall, TDM Messenger is a great option for businesses looking for an efficient communication tool for their employees.