Methods and apparatus, including computer program products, are provided for activity tracking. In some example embodiments, there may be provided a method that includes deriving, from radio frequency based data, pseudo sensor data representative of at least an activity of a user, the pseudo sensor data derived based on at least a machine learning model configured to transform the radio frequency based data into the pseudo sensor data； and providing the pseudo sensor data. Related systems, methods, and articles of manufacture are also described.
