Tinke is small and incredibly convenient cardio-respiratory monitor that lets you check your heart rate, blood oxygen levels, respiratory rate and heart rate variability in less than no time. All you need is your iPhone in order to monitor your wellness stats. This uniquely designed sensing technology offers seamless features on your finger tip. The sensor, after placing your thumb on it, detects the changes in skin blood volume and provides real time stats on iPhone via app. iPhone 5 users got bad news because it wouldn’t work for them unless they find an external adapter.