If you'd like to stop receiving push notifications for Chat, here are several options:
Turn off notifications for a specific thread
Tap on a thread and select the toggle next to "Reply notifications".
A gray toggle means that notifications for that thread have been turned off and you won't receive any push notifications.
Note: At this time, you can only turn off notifications for specific threads and not mute the entire Substack's Chat.
Turn off all notifications for Chat
Tap your Profile icon and select the Settings gear in the top-right corner. Tap "Notifications".
On this screen, 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 this screen, tap Settings next to "Push Notifications" and then tap on "Notification categories". In the Notification categories section, scroll to "Allow notifications" and tap the toggle from green to gray. 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. Select "Unsubscribe".
On the publication's page, tap the three dots in the upper-right corner. Select "Manage Subscription". A new tab will open on your mobile browser and you can unsubscribe by following these steps.
Tip: Once you unsubscribe from a publication, it will not appear in your Library or your Chat.