Are there any iPhone/iOS settings I should or shouldn’t use with my Dexcom ONE+ app?

Here are some recommended settings for iPhone devices, to help ensure you get all Dexcom ONE+ app alerts and sensor readings. Visit dexcom.com/compatibility for a list of devices and operating systems compatible with the Dexcom ONE+ app.
The location of each setting may be different depending on your device and operating system version.
Don’t Use These Phone Features
These phone features can prevent the app from working. The app can’t alert you about these phone features.
Screen Time
Screen Time’s Downtime and App Limits can temporarily disable apps. If you set time limits for the Dexcom ONE+ app, you may not open the app, get alerts or sensor readings.
How to turn Screen Time off?
  1. Go to phone Settings
  2. Tap Screen Time
  3. Turn off Downtime and App Limits, or add Dexcom ONE+ app to the Always Allowed app list
Do Not Disturb
Do Not Disturb silences all alerts. To hear your alerts, don’t use Do Not Disturb.
How to turn Do Not Disturb off?
  1. Go to phone Settings
  2. Tap on Do Not Disturb
  3. Turn it off
Low Power Mode
Low Power Mode may prevent the Dexcom ONE+ app from running in the background when you don’t have the app open and displayed on your phone screen. When Low Power Mode is on, alerts may be delayed.
How to turn Low Power Mode off?
  1. Go to phone Settings
  2. Tap Battery
  3. Turn off Low Power Mode
Required Permissions
You must allow these permissions for the app, or it won’t work as designed.
Notifications
Notifications let you get sensor readings and alerts on your phone. Allow notifications for the Dexcom ONE+ app to work. On iOS 15 and above, do not add the Dexcom ONE+ app to Scheduled Summary.
How to turn Notifications on?
  1. Go to phone Settings
  2. Tap Dexcom ONE+
  3. Tap Notifications
  4. Turn on Notifications
Background App Refresh
App Refresh keeps the Dexcom ONE+ app running in the background when you don’t have the app open and displayed on your phone screen. If Background App Refresh is off, your alerts and sensor readings may be delayed.
How to turn Background App Refresh on?
  1. Go to your smartphone’s Settings
  2. Tap General
  3. Tap Background App Refresh
  4. Turn on Background App Refresh for Dexcom ONE+
Bluetooth
Your Dexcom ONE+ app uses Bluetooth to connect with your transmitter. You must keep your smartphone’s Bluetooth turned on to get alerts and sensor readings. It is also good practice to delete old Dexcom ONE+ sensors and/or Dexcom ONE+ transmitters from your device’s Bluetooth list. (Note) The pairing in Bluetooth for your current Dexcom ONE+ sensor will say “not connected.” That’s OK because it only connects once every 5 minutes to send your sensor reading.
How to remove old sensors from Bluetooth connections
  1. Go to Phone Settings > Bluetooth
  2. Find your used sensor in the list of devices
  3. Tap to see details about the connection
  4. Tap Forget This Device
Tips:
  • Bluetooth shows all sensors as Not Connected
  • All Dexcom ONE+ Dexcom sensor names start with DXCM
You must keep the Bluetooth permissions turned on for the Dexcom ONE+ app to work.
How to turn Bluetooth Permission on
  1. Go to Settings
  2. Tap on Dexcom ONE+
  3. Turn Bluetooth on

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