Game notifications can be turned ON / OFF by in-game setting / mobile phone setting. Please refer to the following for more details.
1) Tap [More] in the bottom right of the main screen.
2) Turn on / off after tapping [Push Notification].
[Mobile device setting]
1) Android phone home screen → Settings → App → Rise of Firstborn → Notification check box ON / OFF
2) IOS phone home screen → Notification → Rise of Firstborn → Notification ON / OFF