Alarms and timers work regardless of whether the app is closed or your device is locked. If the thing is a warning that notifications only show In case the device is awake, make sure your device doesn’t visit sleep (Head over to Settings > System > Power & sleep to https://juliusxwybc.blogdomago.com/21994912/the-single-best-strategy-to-use-for-does-iphone-have-alarm-clock