diff --git a/readme.md b/readme.md
index d6a0829..b0a4dc2 100644
--- a/readme.md
+++ b/readme.md
@@ -154,6 +154,7 @@ CHAT_FLAGS = {
     # last msg haven't been seen by recipient
     "unseen": "✓",
     "secret": "🔒",
+    "seen": "✓✓",  # leave empty if you don't want to see it
 }
 MSG_FLAGS = {
     "selected": "*",
@@ -163,6 +164,7 @@ MSG_FLAGS = {
     "edited": "E",
     "pending": "...",
     "failed": "💩",
+    "seen": "✓✓",  # leave empty if you don't want to see it
 }
 
 # use this app to open url when there are multiple
diff --git a/tg/views.py b/tg/views.py
index be31a0d..18e449a 100644
--- a/tg/views.py
+++ b/tg/views.py
@@ -246,6 +246,12 @@ class ChatView:
         ):
             # last msg haven't been seen by recipient
             flags.append("unseen")
+        elif (
+            msg
+            and self.model.is_me(msg["sender_user_id"])
+            and msg["id"] <= chat["last_read_outbox_message_id"]
+        ):
+            flags.append("seen")
 
         if action_label := _get_action_label(self.model.users, chat):
             flags.append(action_label)
@@ -315,6 +321,11 @@ class MsgView:
         ):
             if not self.model.is_me(chat["id"]):
                 flags.append("unseen")
+        elif (
+            self.model.is_me(msg_proxy.sender_id)
+            and msg_proxy.msg_id <= chat["last_read_outbox_message_id"]
+        ):
+            flags.append("seen")
         if state := msg_proxy.msg.get("sending_state"):
             log.info("state: %s", state)
             state_type = state["@type"]