INTRODUCTION: People diagnosed with Parkinson's Disease (PD) are affected by various motor symptoms, including balance and reaction time. Mobile devices and apps allow assessment and interventions for balance and reaction time in these patients. PURPOSE: Physical therapists must incorporate reaction time activities to improve balance for those with PD. As both improve, the patient will be less susceptible to the motor effects of PD. METHODS: Seven participants were recruited by a sample of convenience from Club Parkinson's. Six participants have been diagnosed with PD and one with essential tremors, with only five completing all sessions. Reaction time and composite balance were recorded and assessed using the Sway MedicalTM mobile application. RESULTS: A review of trends reveals reaction time slightly improved within all trials, likely due to familiarity of the tests. Interestingly, balance scores remained the same across all sessions. All participants reported the assessments as low intensity activities, indicating participants not meeting the 80% intensity guidelines for therapeutic gain. This data contains no statistically significant results due to the small sample size. CONCLUSION: Conducting further research on the effects of reaction time on balance for those with PD is crucial. The relationship between balance and reaction time requires assessment intervention in physical therapy to improve mobility safety. The use of mobile applications such as SWAY MedicalTM benefits those with PD during physical therapy and after sessions are completed. Further studies on balance time and reaction using mobile technology are necessary to improve mobility, reduce fall risk, and mitigate decline with those diagnosed with PD.