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).
Other potential complications include low blood pressure, muscle twitches, and loss of muscle control (such as in the bowel). Hypokalemia can also cause mineral deficiency and loss of muscle in the skeletal system. Other symptoms include excessive urination, extreme thirst, loss of appetite, nausea, and vomiting.