Prolonged sitting can be detrimental to our postures which can cause spinal and pelvic problems. It may also lead to a shortened lifespan due to its adverse impact on cardio metabolic health. One way of preventing and mitigating these risks is to break sedentary time. We find it difficult, however, to actively monitor ourselves and commit to making these breaks in the middle of studying or working. The work presented in this paper proposes a motivational smartphone application that connects to a sensor-equipped seat device to track sitting behavior. The application's distinguishing feature is its interactive virtual pet, which acts as a motivational factor to promote healthier sitting habits. The application analyzes sensor readings from the seat device and prompts users with their virtual pet to take physical action. Our prototype is the outcome of a thorough investigation of user needs.