I searched about the app for measuring blood glucose. Philosys, secured approval from the U.S. Food and Drug Administration for a portable blood glucose meter that hooks into Android devices through the headphone jack. It had previously received 510(k) clearance for a version of the device for iOS network devices.
Philosys is part of a broader trend of innovative approaches to blood glucose monitors and meters connected to smartphones. So far Decosys looks like the smallest and cheapest of the smartphone connected meters to date. Earlier this year, Dexcom got FDA approval clearance for apps to continuously monitor blood-glucose levels.