Use of a Self-Guided Mindfulness Mobile Application to Improve Pain Outcomes in Individuals With Knee Osteoarthritis

\*\*Patients must be able to get care at Nellis, Scott, or Travis Air Force Base (a military installation) in order to participate in this study\*\* Inclusion Criteria: * Male and female Active Duty members and DoD beneficiaries ages 18-74 years * Meet criteria for symptomatic knee osteoarthritis according to the American College of Rheumatology (pain on more than half of the days of the past month during at least one of the following activities: walking, ascending or descending stairs, standing upright, or lying in bed at night) * Demonstrate radiographic evidence of OA, with Kellgren and Lawrence (KL) Grade ≥1 as determined by Lead Site Investigator at each study location * Must have access to a smartphone with enough memory to download the app My Water Balance or the Mindfulness app Exclusion Criteria: * Intra-articular corticosteroid injection in the 3 months prior to participation in the study. * Intra-articular hyaluronic acid/PRP injection in the 6 months prior to participation in the study * Medical condition contraindicating moderate aerobic exercise as determined by their physician * History of knee surgery in the past 6 months or previous knee arthroplasty * Inflammatory joint disease. * Current Practice of Mindfulness * Non-English-speaking * Currently pregnant or planning pregnancy over the study period * Enrollment in other clinical research study during the study period * Inability to comply with treatment protocol, including participation in the Rx3 Home Exercise Program.