I use Grindr Extra and I use unread/read messages filter as a method of filtering potential dates, a bit like email inbox. Selecting multiple messages to mark as read or unread could be a value added feature. Also, when the message from a profile is opened and when you go back to the inbox, the profile is immediately removed in the inbox as it is now read. In theory this works well. But sometimes you want to re-check the message or profile again immediately, but it is already gone. Because I have pinned chats, re-reading a message requires to switch off the unread filter, quite a scroll to skip the pinned chats and then find the message. A useful feature would be swapping down to refresh unread/read messages in the inbox (like Hornet app) instead of automatic removal of read messages. That way, the user has the control.