diff --git a/code/webClient/js/habdec_commands.js b/code/webClient/js/habdec_commands.js
index 90515c0..2f02b1f 100644
--- a/code/webClient/js/habdec_commands.js
+++ b/code/webClient/js/habdec_commands.js
@@ -84,7 +84,7 @@ function ws_onOpen(evt)
 	console.debug("ws_onOpen: init refresh.");
 	RefreshPowerSpectrum();
 	RefreshDemod();
-	// RefreshLivePrint();
+	RefreshStats();
 }
 
 
@@ -271,6 +271,7 @@ function DisplayStats(i_str)
 		'dist_circ': 0,
 		'max_dist': 0,
 		'min_elev': 90,
+		'age': -1
 	};
 
 	var stats_arr = i_str.split(",");
@@ -291,14 +292,20 @@ function DisplayStats(i_str)
 			stats.max_dist = parseFloat(v);
 		if(k == 'min_elev')
 			stats.min_elev = parseFloat(v);
+		if(k == 'age')
+			stats.age = parseInt(v);
 	}
 
-	document.getElementById("cnt_stats").innerHTML =
-		"Ok: " + stats.ok
+	var stats_string = "Ok: " + stats.ok
 		+ " | Dist-Line: " + (stats.dist_line / 1000).toFixed(1) + "km "
 		+ "(" + (stats.max_dist / 1000).toFixed(1) + "km)"
 		+ " | Dist-Circle: " + (stats.dist_circ / 1000).toFixed(1) + "km "
-		+ " | MinElev: " + (stats.min_elev).toFixed(1);
+		+ " | MinElev: " + (stats.min_elev).toFixed(1)
+		+ " | Age: " + stats.age;
+	if(stats.age > 30)
+		document.getElementById("cnt_stats").innerHTML = "<font color=red>" + stats_string + "</font>";
+	else
+		document.getElementById("cnt_stats").innerHTML = "<font color=yellow>" + stats_string + "</font>";
 
 }
 
@@ -367,15 +374,15 @@ function RefreshDemod()
 }
 
 
-/*
-function RefreshLivePrint()
+// stats are send from server on every success sentence
+// but update every 2 seconds to display sentence age
+function RefreshStats()
 {
 	if(!G_HD_CONNECTED)
 		return;
-	SendCommand("liveprint");
-	setTimeout(function () {RefreshLivePrint();}, 1000 / 4);
+	SendCommand("stats");
+	setTimeout(function () {RefreshStats();}, 2000);
 }
-*/
 
 
 function SetBiasT()
diff --git a/code/websocketServer/GLOBALS.h b/code/websocketServer/GLOBALS.h
index 2b40228..bcef5ca 100644
--- a/code/websocketServer/GLOBALS.h
+++ b/code/websocketServer/GLOBALS.h
@@ -68,7 +68,8 @@ public:
 		unsigned int num_ok_ = 0; // num of decoded packets
 		habdec::GpsDistance D_;
 		double dist_max_ = 0;
-		double elev_min_ = std::numeric_limits<double>::max();
+		double elev_min_ = 90.0;
+		std::chrono::steady_clock::time_point last_sentence_timestamp_ = std::chrono::steady_clock::now();
 	};
 	STATS stats_;
 
diff --git a/code/websocketServer/habdec_ws_protocol.cpp b/code/websocketServer/habdec_ws_protocol.cpp
index 4abce72..2ace2f5 100644
--- a/code/websocketServer/habdec_ws_protocol.cpp
+++ b/code/websocketServer/habdec_ws_protocol.cpp
@@ -548,6 +548,10 @@ std::vector< std::shared_ptr<HabdecMessage> >  HandleRequest(std::string command
 		p_msg->data_stream_<<",lon:"<<GLOBALS::get().par_.station_lon_;
 		p_msg->data_stream_<<",alt:"<<GLOBALS::get().par_.station_alt_;
 
+		const auto last_sentence_age = std::chrono::duration_cast<std::chrono::seconds>(
+			std::chrono::steady_clock::now() - stats.last_sentence_timestamp_).count();
+		p_msg->data_stream_<<",age:"<<int(round(last_sentence_age));
+
 		result.push_back(p_msg);
 	}
 	// cmd::****
diff --git a/code/websocketServer/main.cpp b/code/websocketServer/main.cpp
index da38681..4def248 100755
--- a/code/websocketServer/main.cpp
+++ b/code/websocketServer/main.cpp
@@ -298,10 +298,12 @@ void SentenceCallback(std::string callsign, std::string data, std::string crc, s
 	using namespace std;
 	using Ms = std::chrono::milliseconds;
 
+	auto& stats = GLOBALS::get().stats_;
+	stats.last_sentence_timestamp_ = std::chrono::steady_clock::now();
+
 	const string sentence = callsign + "," + data + "*" + crc;
 	const int sentence_number = stoi( data.substr(0, data.find(',')) );
 
-
 	// notify all websocket clients
 	if(p_ws)
 	{
@@ -352,7 +354,6 @@ void SentenceCallback(std::string callsign, std::string data, std::string crc, s
 							GLOBALS::get().par_.coord_format_lat_,
 							GLOBALS::get().par_.coord_format_lon_);
 
-		auto& stats = GLOBALS::get().stats_;
 		stats.D_ = habdec::CalcGpsDistance(
 				GLOBALS::get().par_.station_lat_, GLOBALS::get().par_.station_lon_,
 				GLOBALS::get().par_.station_alt_,