Home screen widgets that show how much data you've used/have remaining for the month, display live data usage by apps running, and your apps that use the most data; Awards you badges based on your data consumption, ranging from Absolute Beginner to Data Tamer Where It Excels. We've mentioned Onavo for Android before, and its iOS cousin.
There can be electrocardiogram (EKG, ECG) changes associated with low potassium, and sometimes the diagnosis of low potassium is made incidentally by finding the characteristic U waves on the EKG tracing. In severe cases, hypokalemia can lead to dangerous disturbances in heart rhythm (dysrhythmia).
Definition. Hypokalemia is a condition of below normal levels of potassium in the blood serum. Potassium, a necessary electrolyte, facilitates nerve impulse conduction and the contraction of skeletal and smooth muscles, including the heart. It also facilitates cell membrane function and proper enzyme activity. Levels must be kept in a proper (homeostatic) balance for the maintenance of health.