Local notifications are a way to inform users when new data becomes available for your app, even when your app is not running in the foreground. For example, a city builder game may inform a user that construction is complete, and a calendar app might inform the user of an upcoming appointment.
Unfortunately Android does not provide any functionality to cover this feature. So there are no "local notifications" on the Android platform. But they provide a variety of different ways how to build and display the notifications. So the developer had to handle the scheduling and delivery of its own. So we decided to implement the delivery system similar to iOS local notifications with TimeInterval Trigger.
Enable Local Notifications API
When you are ready to add local notifications to your application, activate the Local Notifications support, under the Android Native Editor window.
Click on the Local Notification service:
And make sure it's enabled: