diff --git a/apps.json b/apps.json
index 9d9abeb7e..eece25035 100644
--- a/apps.json
+++ b/apps.json
@@ -5448,5 +5448,19 @@
       {"name":"flipper.app.js","url":"flipper.app.js"},
       {"name":"flipper.img","url":"flipper.icon.js","evaluate":true}
     ]
+  },
+  { "id": "ruuviwatch",
+    "name": "Ruuvi Watch",
+    "shortName":"Ruuvi Watch",
+    "icon": "ruuviwatch.png",
+    "version":"1.01",
+    "description": "Keep an eye on RuuviTag devices (https://ruuvi.com). Only shows RuuviTags using the v5 format.",
+    "readme":"README.md",
+    "tags": "bluetooth",
+    "supports": ["BANGLEJS"],
+    "storage": [
+      {"name":"ruuviwatch.app.js","url":"ruuviwatch.app.js"},
+      {"name":"ruuviwatch.img","url":"ruuviwatch.app-icon.js","evaluate":true}
+    ]
   }
 ]
diff --git a/apps/ruuviwatch/ChangeLog b/apps/ruuviwatch/ChangeLog
new file mode 100644
index 000000000..ebde871fa
--- /dev/null
+++ b/apps/ruuviwatch/ChangeLog
@@ -0,0 +1,2 @@
+1.00: Hello Ruuvi Watch!
+1.01: Clear gfx on startup.
\ No newline at end of file
diff --git a/apps/ruuviwatch/README.md b/apps/ruuviwatch/README.md
new file mode 100644
index 000000000..bf4358267
--- /dev/null
+++ b/apps/ruuviwatch/README.md
@@ -0,0 +1,25 @@
+# Ruuvi Watch 
+
+Watch the status of [RuuviTags](https://ruuvi.com) in range. 
+
+ - Id
+ - Temperature (°C)
+ - Humidity (%)
+ - Pressure (hPa)
+ - Battery voltage
+
+ Also shows how "fresh" the data is (age of reading).
+
+ ## Usage
+ 
+ - Scans for devices when launched and every N seconds.
+ - Page trough devices with BTN1/BTN3.
+ - Trigger scan with BTN2.
+
+## Todo / ideas
+
+ - Allow to "name" known devices
+ - Prevent flicker when updating
+ - Include more data
+ - Support older Ruuvi protocols
+
diff --git a/apps/ruuviwatch/ruuviwatch.app-icon.js b/apps/ruuviwatch/ruuviwatch.app-icon.js
new file mode 100644
index 000000000..7ed27ef6c
--- /dev/null
+++ b/apps/ruuviwatch/ruuviwatch.app-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwhC/AH4A/ABMP/4ACCyIVDAAXwCyoYPIggAFCx4oEDBw/JJJguCBhAwLBZYjKBQQeGCIYNHB45bIBw4gIRgw+NC4wwJJ5YRLC5DzFCJBGMEYoSEFxoMEBQIXEF4gVFF5QcEC553JC5QRITgy/NVxIXGf5QlFIwy4IGBQuFC5JhGCwpGGERZOEBQ4MEDAwJJGAzdJCxLVJFxoYLCxoYICx6/GCqAA/AH4A/ACA"))
\ No newline at end of file
diff --git a/apps/ruuviwatch/ruuviwatch.app.js b/apps/ruuviwatch/ruuviwatch.app.js
new file mode 100644
index 000000000..46218a323
--- /dev/null
+++ b/apps/ruuviwatch/ruuviwatch.app.js
@@ -0,0 +1,151 @@
+require("Storage").write("ruuviwatch.info",{
+    "id":"ruuviwatch",
+    "name":"Ruuvi Watch",
+    "src":"ruuviwatch.app.js",
+    "icon":"ruuviwatch.img"
+  });
+  
+  const lookup = {};
+  const ruuvis = [];
+  let current = 0;
+  
+  function int2Hex (str) {
+    return ('0' + str.toString(16).toUpperCase()).slice(-2);
+  }
+  
+  function p(data) {
+    const OFFSET = 7; // 0-4 header, 5-6 Ruuvi id
+    const robject = {};
+    robject.version = data[OFFSET];
+  
+    let temperature = (data[OFFSET+1] << 8) | (data[OFFSET+2] & 0xff);
+    if (temperature > 32767) {
+      temperature -= 65534;
+    }
+    robject.temperature = temperature / 200.0;
+  
+    robject.humidity = (((data[OFFSET+3] & 0xff) << 8) | (data[OFFSET+4] & 0xff)) / 400.0;
+    robject.pressure = ((((data[OFFSET+5] & 0xff) << 8) | (data[OFFSET+6] & 0xff)) + 50000) / 100.0;
+  
+    let accelerationX = (data[OFFSET+7] << 8) | (data[OFFSET+8] & 0xff);
+    if (accelerationX > 32767) accelerationX -= 65536; // two's complement
+    robject.accelerationX = accelerationX / 1000.0;
+  
+    let accelerationY = (data[OFFSET+9] << 8) | (data[OFFSET+10] & 0xff);
+    if (accelerationY > 32767) accelerationY -= 65536; // two's complement
+    robject.accelerationY = accelerationY / 1000.0;
+  
+    let accelerationZ = (data[OFFSET+11] << 8) | (data[OFFSET+12] & 0xff);
+    if (accelerationZ > 32767) accelerationZ -= 65536; // two's complement
+    robject.accelerationZ = accelerationZ / 1000.0;
+  
+    const powerInfo = ((data[OFFSET+13] & 0xff) << 8) | (data[OFFSET+14] & 0xff);
+    robject.battery = ((powerInfo >>> 5) + 1600) / 1000.0;
+    robject.txPower = (powerInfo & 0b11111) * 2 - 40;
+    robject.movementCounter = data[OFFSET+15] & 0xff;
+    robject.measurementSequenceNumber = ((data[OFFSET+16] & 0xff) << 8) | (data[OFFSET+17] & 0xff);
+  
+    robject.mac = [
+      int2Hex(data[OFFSET+18]),
+      int2Hex(data[OFFSET+19]),
+      int2Hex(data[OFFSET+20]),
+      int2Hex(data[OFFSET+21]),
+      int2Hex(data[OFFSET+22]),
+      int2Hex(data[OFFSET+23])
+    ].join(':');
+  
+    robject.name = "Ruuvi " + int2Hex(data[OFFSET+22]) + int2Hex(data[OFFSET+23]);
+    return robject;
+  }
+  
+  function getAge(created) {
+     const now = new Date().getTime();
+     const ago = ((now - created) / 1000).toFixed(0);
+    return ago > 0 ? ago + "s ago" : "now";
+  }
+  
+  function redraw() {
+    if (ruuvis.length > 0 && ruuvis[current]) {
+      const ruuvi = ruuvis[current];
+      g.clear();
+      g.setFontAlign(0,0);
+      g.setFont("Vector",12);
+      g.drawString(" (" + (current+1) + "/" + ruuvis.length + ")", g.getWidth()/2, 10);
+      g.setFont("Vector",20);
+      g.drawString(ruuvi.name, g.getWidth()/2, 30);
+      g.setFont("Vector",12);
+      const age = getAge(ruuvi.time);
+      if(age > (5*60)) {
+        g.setColor("#ff0000");
+      } else if (age > 60) {
+        g.setColor("#f39c12");
+      } else {
+        g.setColor("#2ecc71");
+      }
+      g.drawString(age, g.getWidth()/2, 50);
+      g.setColor("#ffffff");
+      g.setFont("Vector",60);
+      g.drawString(ruuvi.temperature.toFixed(2) + "°c", g.getWidth()/2, g.getHeight()/2);
+      g.setFontAlign(0,1);
+      g.setFont("Vector",20);
+      g.drawString(ruuvi.humidity + "% " + ruuvi.pressure + "hPa ", g.getWidth()/2, g.getHeight()-30);
+      g.setFont("Vector",12);
+      g.drawString(ruuvi.battery + "v", g.getWidth()/2, g.getHeight()-10);
+    } else {
+      g.clear();
+      g.drawImage(require("Storage").read("ruuviwatch.img"), g.getWidth()/2-24, g.getHeight()/2-24);
+      g.setFontAlign(0,0);
+      g.setFont("Vector",16);
+      g.drawString("Looking for Ruuvi...", g.getWidth()/2, g.getHeight()/2 + 50);
+    }
+  }
+  
+  function scan() {
+    NRF.findDevices(function(devices) {
+      let foundNew = false;
+        devices.forEach(device => {
+          const data = p(device.data);
+          data.time = new Date().getTime();
+          const idx = lookup[data.name];
+          if (idx !== undefined) {
+            ruuvis[idx] = data;
+          } else {
+            lookup[data.name] = ruuvis.push(data)-1;
+            foundNew = true;
+          }
+        });
+        redraw();
+        if (foundNew) {
+          Bangle.buzz();
+          g.flip();
+        }
+  
+    }, {timeout : 2000, filters : [{ manufacturerData:{0x0499:{}} }] });
+  }
+  
+  g.clear();
+  g.drawImage(require("Storage").read("ruuviwatch.img"), g.getWidth()/2-24, g.getHeight()/2-24);
+  
+  var drawInterval = setInterval(redraw, 1000);
+  var scanInterval = setInterval(scan, 10000);
+  setWatch(() => {
+    current--;
+    if (current < 0) {
+      current = ruuvis.length-1;
+    }
+    redraw();
+  }, BTN1, {repeat:true});
+  
+  setWatch(() => {
+    scan();
+  }, BTN2, {repeat:true});
+  
+  setWatch(() => {
+    current++;
+    if (current >= ruuvis.length) {
+      current = 0;
+    }
+    redraw();
+  }, BTN3, {repeat:true});
+  
+  scan();
\ No newline at end of file
diff --git a/apps/ruuviwatch/ruuviwatch.png b/apps/ruuviwatch/ruuviwatch.png
new file mode 100644
index 000000000..3737a7e8c
Binary files /dev/null and b/apps/ruuviwatch/ruuviwatch.png differ