2025-07-23 00:00:00 Convenient and efficient operation of your heating system. The Viessmann Vitotrol app allows you to operate Viessmann heating systems with Vitotronic control units. Operation of the app is simple, easy and convenient from anywhere and at any time of the day. The Vitotrol app uses has a context-sensitive help function. The Vitotrol app will provide access to the following functions of the Vitotronic heating circuit control unit: