diff --git a/internal/session/session.go b/internal/session/session.go
index f5118407..716f1115 100644
--- a/internal/session/session.go
+++ b/internal/session/session.go
@@ -98,7 +98,13 @@ func (session *SessionCtx) ConnectWebSocketPeer(websocketPeer types.WebSocketPee
 	}
 
 	session.logger.Info().Msg("set websocket connected")
+
+	// update state
+	now := time.Now()
 	session.state.IsConnected = true
+	session.state.ConnectedSince = &now
+	session.state.NotConnectedSince = nil
+
 	session.manager.emmiter.Emit("connected", session)
 
 	// if there is a previous peer, destroy it
@@ -154,7 +160,12 @@ func (session *SessionCtx) DisconnectWebSocketPeer(websocketPeer types.WebSocket
 	//
 
 	session.logger.Info().Msg("set websocket disconnected")
+
+	now := time.Now()
 	session.state.IsConnected = false
+	session.state.ConnectedSince = nil
+	session.state.NotConnectedSince = &now
+
 	session.manager.emmiter.Emit("disconnected", session)
 
 	session.websocketMu.Lock()
@@ -235,7 +246,16 @@ func (session *SessionCtx) SetWebRTCConnected(webrtcPeer types.WebRTCPeer, conne
 		Bool("connected", connected).
 		Msg("set webrtc connected")
 
+	// update state
 	session.state.IsWatching = connected
+	if now := time.Now(); connected {
+		session.state.WatchingSince = &now
+		session.state.NotWatchingSince = nil
+	} else {
+		session.state.WatchingSince = nil
+		session.state.NotWatchingSince = &now
+	}
+
 	session.manager.emmiter.Emit("state_changed", session)
 
 	if connected {
diff --git a/pkg/types/session.go b/pkg/types/session.go
index a872587e..e901ad7a 100644
--- a/pkg/types/session.go
+++ b/pkg/types/session.go
@@ -3,6 +3,7 @@ package types
 import (
 	"errors"
 	"net/http"
+	"time"
 )
 
 var (
@@ -25,7 +26,16 @@ type SessionProfile struct {
 
 type SessionState struct {
 	IsConnected bool `json:"is_connected"`
-	IsWatching  bool `json:"is_watching"`
+	// when the session was last connected
+	ConnectedSince *time.Time `json:"connected_since,omitempty"`
+	// when the session was last not connected
+	NotConnectedSince *time.Time `json:"not_connected_since,omitempty"`
+
+	IsWatching bool `json:"is_watching"`
+	// when the session was last watching
+	WatchingSince *time.Time `json:"watching_since,omitempty"`
+	// when the session was last not watching
+	NotWatchingSince *time.Time `json:"not_watching_since,omitempty"`
 }
 
 type Settings struct {