Tinké by Zensorium measures heart rate, respiratory rate, blood oxygen level and heart rate variability. It compiles the heart rate, respiratory rate and blood oxygen level information into a score know as the Vita Index. The Zen index uses the heart rate variability to quantify your stress level. It is a small device, 1.65 long inches by 1.26 wide by .0275 deep which fits easily into a pocket or purse. It works by plugging it into the iPhone and then placing your thumb on the device for 30 seconds. The iPhone powers it and so there is no need for batteries.
The device is $119 and comes in a variety of colors.The Tinké is available through the Zensorium website. They are looking for distribution partners. The app is free and available in the iTunes store. You can share your results thru the Tinké network or other social networks. Within the Tinké network you add friends and post comments on their scores. You also have the option to keep your information private.