Diabetics test blood glucose levels by pricking a finger with a lancet, placing a drop of blood on a test strip, and using a meter to display the result. To ease pain in the fingers, it is a good idea to rotate fingers and locations to prick. The FingerPrick app will map and log your finger pricks in 9 zones per finger. The app will interface with the built-in Apple Health App (with user permission).The Health app is available only on the iPhone.