please its a request to dont mark my question as irrelevent ,duplicate,etc
i want to clear the point
in one of stackoverflow answer--> https://stackoverflow.com/a/57018094/12553303
this user saying that
The job given to the IntentService would get lost when the application is killed
and in one of the site --> https://guides.codepath.com/android/starting-background-services
this blog says -->
The IntentService class used to be the way for running an operation on a single background thread. IntentService runs outside the application in a background process, so the process would run even if your application is closed.
Thanks need clarification
Since Android 8.0 IntentService changed so the System can kill your background process when it consider necessary and now, since API 30 it is deprecated.
If you want something that survive when app get closed, consider using WorkManager or JobIntentService.