It was more of a "can it be done" type of project, with less of an eye on usefulness.
If a diabetic checks their blood sugar 30 times a day with a CGM, then digging out your phone, pressing power, getting past the lock screen, opening the app each time is 8+ seconds of annoying. The premise is to get the information with less steps.
Also, at home a person is not always carrying their cell phone around. A lot of the human factors for such things I wrap around less steps, less work for the user.