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Documentation:
<https://developer.android.com/jetpack/compose/navigation#nav-to-composable>
<https://developer.android.com/guide/navigation/navigation-navigate#pop>

What specifically do you want to know? This is really a broad question.

thanks for links I already checked them. When I am doing navcontroller.popBackStack to navigate back the viewmodel is kept in the memory. I want to kill that viewmodel

What viewmodel? Viewmodel of the screen you pop to or from which you pop?

I will give example. I am in the chat screen and want to go back to chat list screen. Both of them have viewmodels. So when I go back to chat list and open another chat I am getting messages from previous chats. Their viewmodels are still alive. I want to just kill chat screen viewmodel as soon as I go back to chat list

navController.popBackStack doesn't do that

I see, so you navigate *ChatList -&gt; Chat* where you inject your VM using composable function `getViewModel()`. Then you call `navController.popBackStack()` which navigates you back to *ChatList*. When you navigate again to different *Chat* destination, you get the same VM instance? Can you verify that it is the same instance and not just VM that fetches the same data?

it's not same VM instance. if I open let's say 5 chat it creates 5 viewmodels. so When I open chat 6 I will get every message that was sent in previous 5 chats. I just want to kill the viewmodel as soon as I leave the Chat screen so when I open new chat viewmodel will be freshly created

Well if it's different instance, than the previous ViewModel has been killed, no? Than I don't really understand the problem

it's not getting killed. I don't know why. each time it creates different instance and that instance lives in memory

Are you sure you don't keep a reference to the Viewmodel somewhere? And can you check that `onCleared` is called in the VM?

`onCleared` is not getting called when I navigate back

Weird, what dependency injection are you using? Koin?

changed to viewModel but still is not getting cleared

There you go :smile: That's weird that you got a different instance actually.

wait emulator is shown offline for some reason let me check again

Well... I don't what else to check :shrug:

thank you sooo much <@UE4JAH6M9> you saved me tons of headaches

No worries :ok_hand:
Just next time you have to ask something more specific and it's better to write what you've tried so far. Seeing question like "_how to popBackStack with popUpTo?_" is really annoying because you will have to ask a lot of questions first to find the problem.

Thanks for your patience. I surely will next time :relieved: