I recall watching a youtube video where the developer of the “Loop” (that @terry4 uses) mentioned he was hired by Apple at the end of the video. Here is the post…
I was hoping that Apple “secret team” was developing a closed loop insulin delivery app that had a user interface that was well designed like the Loop.
Not too excited about an optical BG sensor as the invasive one works well enough for me, but it is always good to hear people trying.