What are IOS Critical Alerts?

The below FAQs will help you understand how you can control iOS Critical Alerts on the Dexcom G6 app.
Talk to your healthcare professional before changing your alert settings.
What are iOS Critical Alerts?
iOS Critical Alerts are a type of Apple notification. They’re used for high-priority notifications like weather emergencies or urgent low glucose.
Why did Dexcom change Dexcom G6 alerts to iOS Critical Alerts?
Previously, the Dexcom G6 app used a “custom override” to sound for alerts like Urgent Low when iPhones were set to mute or DND.
We replaced the “custom override” with iOS Critical Alerts to guarantee that the G6 app can continue to override an iPhone’s mute / DND to sound for alerts, like Urgent Low.
You may have other apps that use iOS Critical Alerts, like weather or home security apps that may need to override and sound for important events. You can check what other apps on your phone may use iOS Critical Alerts by going to any of your apps’ notification settings.
Why do iOS Critical Alerts appear with an exclamation point?
Apple designed the notification labels for iOS Critical Alerts. Dexcom cannot change the design.
As a reminder, you can control if the optional Dexcom G6 app alerts appear as iOS Critical Alerts by toggling Always Sound ON or OFF.
We’ve received feedback that the iOS Critical Alerts label is more alarming than you may expect. Since Apple controls the notification design, it would be more beneficial to share this feedback directly with them.
Are iOS Critical Alerts required to use the G6 app?
Yes. With Critical Alerts, the urgent low glucose alarm will still sound even when your phone is in Mute / Do Not Disturb (DND).
Other important alerts that will still sound include Sensor Failed, Transmitter Failed, and the App Stopped Alert. If you’ve turned on ‘Always Sound’, other alerts you’ve activated will also sound, only if you’ve chosen a Sound setting that isn’t Vibrate Only.
How can I stop alerts from showing as an iOS critical alert?
Turn Always Sound OFF within your G6 app settings. If Always Sound is ON, alerts will sound even when your phone is on Mute or DND. Turning Always Sound OFF won’t turn your alerts off. You’ll still see notifications on your phone lock screen.
To turn Always Sound OFF, go to your G6 App > tap Settings > tap Alerts > toggle Always Sound OFF.
The below optional alerts show as iOS Critical Alerts ONLY if Always Sound is ON:
  • High glucose
  • Low glucose
  • Urgent Low soon
  • Rise rate
  • Fall rate
  • Signal loss
  • No readings
The alarm and alerts below always show as iOS Critical Alerts:
  • Urgent Low
  • Transmitter Failed
  • Sensor Failed
  • App Stopped
How do I stop alerts from sounding?
Set any of the optional alerts below to Vibrate Only within Sound settings.
Go to your G6 App > tap Settings > tap Alerts > Tap an alert like High Glucose > tap Sound > Choose Vibrate Only. Repeat for each alert you want to set to Vibrate Only. You will no longer hear this alert.
Optional alerts:
  • High glucose
  • Low glucose
  • Urgent Low soon
  • Rise rate
  • Fall rate
  • Signal loss
  • No readings
Importantly, alerts set to Vibrate Only will never sound even if you have Always Sound ON.
How can I make notifications show on my iPhone instead of my Apple Watch?
Since the Dexcom G6 app uses iOS Critical Alerts, these types of notifications follow the pattern set by Apple. As stated in Apple documentation, "Notifications go to either your Apple Watch or iPhone, but not both." support.apple.com/en-us/HT204791
To get G6 app notifications on your iPhone instead of your Apple Watch, go to your Apple Watch app on your iPhone > Tap Notifications > Scroll to Dexcom G6 > Turn OFF mirror on G6 watch app.
This setting only stops G6 app notifications from displaying on the Apple Watch. The Dexcom G6 app watch app and watch complication will continue working.

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