Posture instability is also one of the common and disabling features of Parkinson’s disease. Although it is not common in early stages but, it is one of the most common distressing factors for patients in later stages. This test is intended to identify posture instability in a Parkinson patient. User simply has to put the smartphone in the front pocket while, making sure that phone is not tilted. ParkinsonAI captures the respective data by leveraging the different sensors of the Smart Phone.