diff --git a/apps/stopwatch/app.js b/apps/stopwatch/app.js
new file mode 100644
index 000000000..cf7186c98
--- /dev/null
+++ b/apps/stopwatch/app.js
@@ -0,0 +1,159 @@
+const EMPTY_LAP = '--:--:---';
+const EMPTY_H = '00:00:000';
+const MAX_LAPS = 6;
+const XY_CENTER = g.getWidth() / 2;
+const Y_CHRONO = 40;
+const Y_HEADER = 80;
+const Y_LAPS = 125;
+const Y_BTN3 = 225;
+const FONT = '6x8';
+const CHRONO = '/* C H R O N O */';
+
+var laps = [EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP];
+var started = false;
+var reset = false;
+var whenStarted;
+var whenStartedTotal;
+var currentLapIndex = 1;
+var currentLap = '';
+var chronoInterval;
+
+// Set laps.
+setWatch(() => {
+
+  reset = false;
+  
+  if (started) {
+    changeLap();
+  } else {
+    if (!reset) {
+      chronoInterval = setInterval(chronometer, 10);
+    }
+  }
+}, BTN1, { repeat: true, edge: 'rising' });
+
+// Reset chronometre.
+setWatch(() => { resetChrono(); }, BTN3, { repeat: true, edge: 'rising' });
+
+// Show launcher when middle button pressed.
+setWatch(Bangle.showLauncher, BTN2, { repeat: false, edge: 'falling' });
+
+function resetChrono() {
+  laps = [EMPTY_H, EMPTY_H, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP];
+  started = false;
+  reset = true;
+  currentLapIndex = 1;
+  currentLap = '';
+
+  if (chronoInterval !== undefined) {
+    clearInterval(chronoInterval);
+  }
+
+  printChrono();
+}
+
+function chronometer() {
+
+  if (!started) {
+    var rightNow = Date.now();
+    whenStarted = rightNow;
+    whenStartedTotal = rightNow;
+    started = true;
+    reset = false;
+  }
+
+  currentLap = calculateLap(whenStarted);
+  total = calculateLap(whenStartedTotal);
+
+  laps[0] = total;
+  laps[1] = currentLap;
+  printChrono();
+}
+
+function changeLap() {
+
+  currentLapIndex++;
+
+  if ((currentLapIndex) > MAX_LAPS) {
+    currentLapIndex = 2;
+  }
+
+  laps[currentLapIndex] = currentLap;
+  whenStarted = Date.now();
+}
+
+function calculateLap(whenStarted) {
+
+  var now = Date.now();
+  var diffTime = now - whenStarted;
+  var dateDiffTime = new Date(diffTime);
+
+  var millis = padStart(dateDiffTime.getMilliseconds().toString(), 3);
+  var seconds = padStart(dateDiffTime.getSeconds().toString(), 2);
+  var minutes = padStart(dateDiffTime.getMinutes().toString(), 2);
+
+  return `${minutes}:${seconds}:${millis}`;
+}
+
+function printChrono() {
+
+  g.reset();
+  g.setFontAlign(0, 0);
+
+  var print = '';
+
+  g.setFont(FONT, 2);
+  print = CHRONO;
+  g.drawString(print, XY_CENTER, Y_CHRONO, true);
+
+  g.setColor(0, 220, 0);
+  g.setFont(FONT, 3);
+  print = ` T ${laps[0]}\n`;
+  print += ` C ${laps[1]}\n`;
+  g.drawString(print, XY_CENTER, Y_HEADER, true);
+
+  g.setColor(255, 255, 255);
+  g.setFont(FONT, 2);
+
+  for (var i = 2; i < MAX_LAPS + 1; i++) {
+
+    g.setColor(255, 255, 255);
+    let suffix = ' ';
+    if (currentLapIndex === i) {
+      let suffix = '*';
+      g.setColor(255, 200, 0);
+    }
+
+    const lapLine = `L${i - 1} ${laps[i]} ${suffix}\n`;
+    g.drawString(lapLine, XY_CENTER, Y_LAPS + (15 * (i - 1)), true);
+  }
+
+  g.setColor(255, 255, 255);
+  g.setFont(FONT, 1);
+  print = 'Press 3 to reset';
+  g.drawString(print, XY_CENTER, Y_BTN3, true);
+
+  g.flip();
+}
+
+function padStart(value, size) {
+
+  var result = '';
+  var pads = size - value.length;
+
+  if (pads > 0) {
+    for (var i = 0; i < pads; i++) {
+      result += '0';
+    }
+  }
+
+  result += value;
+  return result;
+}
+
+// Clean app screen.
+g.clear();
+Bangle.loadWidgets();
+Bangle.drawWidgets();
+
+resetChrono();