Many people with Overactive Bladder (OAB) continue to have symptoms such as urinary urgency, frequency, and leakage even while taking medication. This research study is being done to see whether using the ZIDA sock, an FDA approved wearable device, can help reduce symptoms when added to a person's usual OAB medication. The ZIDA sock provides mild electrical stimulation to a nerve near the ankle and is worn like a regular sock. Participants will use the ZIDA sock at home once a week for 30 minutes over 12 weeks. Participants will be asked to complete bladder diaries to record urinary symptoms and questionnaires about their bladder symptoms, quality of life, and satisfaction with the device. Study staff will also ask about any side effects or discomfort related to device use. The information collected will help determine whether the ZIDA sock is a helpful add-on treatment for people with OAB who still have symptoms despite medication.