Abstract: A system for evaluating a posture of a user operating a computing device can include one or more processors, a sensor suite configured to generate sensor data corresponding to a three-dimensional (3D) orientation of a user's body, and one or more machine-readable, non-transitory storage mediums that include instructions configured to cause the one or more processors to perform operations including: estimating the user's posture based on the sensor data from the sensor suite; receiving application data corresponding to an application that the user is interfacing with on the computing device; and generating a classification of the user's posture based on a comparison of the estimated posture with a plurality of posture types. The performed operations may further include determining a recommendation to modify and improve the user's posture based on the classification and the application data and generating a user-accessible output that corresponds to the recommendation.