Monitoring Hyperkalemia Using Point-of-care AI-enabled ECG Device Among Patients With Chronic Kidney Disease Stages 3b-5

The clinical trial will be conducted in a real-world outpatients setting with the goal of learning if monitoring serum potassium frequently among patients with moderate-to-advanced stages of chronic kidney disease leading to optimal management of hyperkalemia (the reduced occurrence of serum potassium ≥ 5.0 mmol/L during 6 months of follow-up). It will also learn about the adherence of using a mobile monitoring device. Participants will: * Measure their serum potassium using an AI-enhanced point-of-care ECG device at least twice per week * Receive health education prompts to reduce intake of potassium rich foods if their electrocardiogram device measured serum potassium is abnormal * Receive alerts to visit nephrology clinic if their electrocardiogram device measured serum potassium is continuously abnormal