Home-Based Physical Activity Program With Digital App Versus Health Education Group for Improving Physical Activity Among Patients With Non-muscle Invasive Bladder Cancer, The EMPOWER Trial

Inclusion Criteria: * Adults (age \>= 18 years) * Prior diagnosis of non-muscle invasive bladder cancer (NMIBC), currently on surveillance or receiving maintenance intravesical therapy (including intravesical chemotherapy, immunotherapy) * Classified as insufficiently active on the Physical Activity as a Vital Sign (PAVS) assessment * Has an Android or Apple Smartphone/Tablet * Ambulatory * English-speaking * Willing and able to participate in study activities and sign the informed consent form Exclusion Criteria: * Severe cognitive or memory impairment/dementia precluding ability to follow instructions or participate in survey assessments * Inability to read or understand English * Lack of access or lack of sufficient facility to use an Android or iOS smart device with the minimum criteria to run the ExerciseRx app * Not receiving treatment at University of Washington (UW) * Orthopedic, neurologic, or other problems that prevent safe ambulation and protocol adherence. Information on prior falls and other recent orthopedic or neurologic problems will be used to make judgment about protocol eligibility * Inability/Unwillingness to participate in a personalized exercise program * Current diagnosis with muscle-invasive or metastatic bladder cancer * Uncontrolled or concurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements * Lack of access or lack of sufficient facility to use an Android or iOS smart device with the minimum criteria for using the ExerciseRx app * Participation in a clinical trial that does not permit enrollment in the EMPOWER trial