The reader that came with the glucose sensor would not work, keeps saying incompatible sensor (yet it came with it) The app does what's it supposed to do, but it demands override of do not disturbon the phone. I think most of us know how and when to do a glucose scan, but the app annoys with a frequent beep to scan, forcing me to turn my phone off just so anyone can sleep. We just need a reader, not a forced monitor. Will be looking into alternative glucose reading devices.