This might be answered in the previous 2 or 3 pages. I too am quite annoyed by the alert sound level - it is only really useful if you have hypoglycemia unawareness.
As well, if I see that my BG is 71 and so I eat 20g glucose. Then my BG drops down to 64 which is below my "urgent low" threshold of 65 - either because my BG was already dropping, or because my pancreas managed to still produce a bit of (unneeded) insulin - and the alpha cells don't work anymore.
Either way, I get an extremely loud beep, which I don't need - I already know my BG is low! As well, for some reason I don't start to "lose function" until my BG goes below about 40, even though I know that it's low. (Or lower - why my body can seemingly function normally all the way down to 35 sometimes, I have no idea..)
Does anyone have the IPA file of the old app? (Or will I have to jailbreak the phone and figure out how to hack the app, or figure out how to use xDrip? Or I suppose just put up with it, but I'd rather not.)
I do hope that Apple only lets very critical applications have this "Override Do-Not-Disturb" entitlement.