If you'd like to stop receiving push notifications for Chat on the Substack app, here are several options:
Turn off notifications for a publication for iOS
On the Substack iOS app, tap on a publication and select "Mute chat".
Select how long you'd like to mute the chat for: one hour, until the next day, or until you manually unmute the chat.
Turn off notifications for a publication for Android
Tap on a publication on your Chat dashboard and select "Mute".
Turn off all notifications for Chat on the Substack app
Tap your profile picture and select Settings. In the Settings menu, tap Notifications.
On your Notifications, make sure that the toggles are on the left for each item listed in the Chat section. You will not receive any push notifications about Chat.
On the Notifications screen, move every toggle in the Chat section to the left. This means that Chat notifications will stop immediately.
To leave a Chat
At this time, the only way to fully leave a Chat is by unsubscribing from the publication.
On the publication's page, tap the three dots in the upper-right corner. Tap "Unsubscribe".