The numbers of portable blood glucose monitors linked to smartphones are exploding, given that there are some 26 million diabetics in the U.S. alone and hundreds of millions globally. Glooko is a startup in this space. It helps diabetics to record and monitor their blood sugar levels by connecting one of 17 FDA-approved glucose meters with their smartphone. Another is iHealth Lab out of Mountain View, Calif., which has a portable Bluetooth-enabled blood glucose monitor that allows people to take a reading and have the results sync automatically to their iOS or Android device and stored in the cloud.