Here are some ways that we are aware of that can cause reminders not to display:

• Your device is in a power saving mode. Check for a power mode or similar option in your system settings and make sure your device is not in an aggressive power saving mode.
  
  
• Notifications are disabled for Ultimate To-Do List. In your device's settings area, visit the apps section and select Ultimate To-Do List.  Make sure notifications are turned on, including for task reminders.
  
  
• Battery optimizations could be interfering with the app. To check, visit the Apps section of your device's settings, then select Ultimate To-Do List and tap on the app's battery options. Make sure the option to allow background activity is selected and that your device is not optimizing battery usage.
  

• Account settings have reminders disabled. To check, go to the app’s settings area, then tap on “Account Management” followed by the name of your account. Make sure the reminder options are turned on.

• The reminder field is disabled.  To check go to the app's settings area and tap on "Fields/Functions Used".
  
  
• The reminder priority needs to be increased. In the app's settings area, go to the reminder options section and raise the notification priority to the maximum. Also, disable ongoing notifications if set.
  

• Low volume. If the reminder appears in your notification area but there is no sound, then check your notification volume level.

• Invalid sound setting.  If the reminder appears in your notification bar but there is no sound even though your volume is up, then go to the "reminder options" area of the app's settings and try changing the "sound to play" option.
  
  
• Using an app that interferes with the normal display of notifications.
  

• Having the device off at the time the reminder should be displaying.

• Snoozing a reminder and then rebooting the device before the reminder appears (this should be fixed in a future release).

• Using another program that is also synchronizing with your Toodledo or Google account, which doesn’t support reminders/alarms.

• For location reminders to work, you must have your device's location settings on high accuracy. It may also help to increase the reminder radius in the app's settings area.