Do notifications work in Do Not Disturb?
You will receive notifications even when the app is in the background, as long as critical notifications are turned on.
Yes, if critical alerts are enabled in the app. You will then be notified if your measurements go outside the limits you have selected, even if the screen is locked or the app is running in the background. You can customize which critical alerts are on, so you only receive the alerts that are most important to you.