diff --git a/apps/miclock2/ChangeLog b/apps/miclock2/ChangeLog
index 534332e631..c34ba135cf 100644
--- a/apps/miclock2/ChangeLog
+++ b/apps/miclock2/ChangeLog
@@ -1,3 +1,4 @@
 0.01: New App!
 0.02: Redraw only when seconds change
 0.03: Fix typo in redraw check
+0.04: Register as clock and implement fast loading
diff --git a/apps/miclock2/clock-mixed.js b/apps/miclock2/clock-mixed.js
index bb15373130..e6bc0c0943 100644
--- a/apps/miclock2/clock-mixed.js
+++ b/apps/miclock2/clock-mixed.js
@@ -1,29 +1,30 @@
 // Code based on the original Mixed Clock
 
+{
 /* jshint esversion: 6 */
-var locale = require("locale");
+const locale = require("locale");
 const Radius = { "center": 7, "hour": 60, "min": 80, "dots": 88 };
 const Center = { "x": 120, "y": 96 };
 const Widths = { hour: 2, minute: 2 };
-var buf = Graphics.createArrayBuffer(240,192,1,{msb:true});
-var lastDate = new Date();
-
-function rotatePoint(x, y, d) {
-    rad = -1 * d / 180 * Math.PI;
-    var sin = Math.sin(rad);
-    var cos = Math.cos(rad);
-    xn = ((Center.x + x * cos - y * sin) + 0.5) | 0;
-    yn = ((Center.y + x * sin - y * cos) + 0.5) | 0;
-    p = [xn, yn];
-    return p;
-}
+const buf = Graphics.createArrayBuffer(240,192,1,{msb:true});
+let timeoutId;
+
+const rotatePoint = function(x, y, d, center, res) {
+  "jit";
+  const rad = -1 * d / 180 * Math.PI;
+  const sin = Math.sin(rad);
+  const cos = Math.cos(rad);
+  res[0] = ((center.x + x * cos - y * sin) + 0.5) | 0;
+  res[1] = ((center.y + x * sin - y * cos) + 0.5) | 0;
+};
 
 
 // from https://github.com/espruino/Espruino/issues/1702
-function setLineWidth(x1, y1, x2, y2, lw) {
-    var dx = x2 - x1;
-    var dy = y2 - y1;
-    var d = Math.sqrt(dx * dx + dy * dy);
+const setLineWidth = function(x1, y1, x2, y2, lw) {
+    "ram";
+    let dx = x2 - x1;
+    let dy = y2 - y1;
+    let d = Math.sqrt(dx * dx + dy * dy);
     dx = dx * lw / d;
     dy = dy * lw / d;
 
@@ -44,71 +45,84 @@ function setLineWidth(x1, y1, x2, y2, lw) {
         x2 - dy, y2 + dx,
         x1 - dy, y1 + dx
     ];
-}
+};
+
+const drawMixedClock = function() {
+  const date = new Date();
+  const dateArray = date.toString().split(" ");
+  const isEn = locale.name.startsWith("en");
+  let point = [0, 0];
+  const minute = date.getMinutes();
+  const hour = date.getHours();
+  let radius;
+
+  g.reset();
+  buf.clear();
+
+  // draw date
+  buf.setFont("6x8", 2);
+  buf.setFontAlign(-1, 0);
+  buf.drawString(locale.dow(date,true) + ' ', 4, 16, true);
+  buf.drawString(isEn?(' ' + dateArray[2]):locale.month(date,true), 4, 176, true);
+  buf.setFontAlign(1, 0);
+  buf.drawString(isEn?locale.month(date,true):(' ' + dateArray[2]), 237, 16, true);
+  buf.drawString(dateArray[3], 237, 176, true);
+
+  // draw hour and minute dots
+  for (i = 0; i < 60; i++) {
+      radius = (i % 5) ? 2 : 4;
+      rotatePoint(0, Radius.dots, i * 6, Center, point);
+      buf.fillCircle(point[0], point[1], radius);
+  }
 
-function drawMixedClock(force) {
-  var date = new Date();
-  if ((force || Bangle.isLCDOn()) && buf.buffer && date.getSeconds() !== lastDate.getSeconds()) {
-    lastDate = date;
-    var dateArray = date.toString().split(" ");
-    var isEn = locale.name.startsWith("en");
-    var point = [];
-    var minute = date.getMinutes();
-    var hour = date.getHours();
-    var radius;
-    
-    g.reset();
-    buf.clear();
-    
-    // draw date
-    buf.setFont("6x8", 2);
-    buf.setFontAlign(-1, 0);
-    buf.drawString(locale.dow(date,true) + ' ', 4, 16, true);
-    buf.drawString(isEn?(' ' + dateArray[2]):locale.month(date,true), 4, 176, true);
-    buf.setFontAlign(1, 0);
-    buf.drawString(isEn?locale.month(date,true):(' ' + dateArray[2]), 237, 16, true);
-    buf.drawString(dateArray[3], 237, 176, true);
-
-    // draw hour and minute dots
-    for (i = 0; i < 60; i++) {
-        radius = (i % 5) ? 2 : 4;
-        point = rotatePoint(0, Radius.dots, i * 6);
-        buf.fillCircle(point[0], point[1], radius);
-    }
+  // draw digital time
+  buf.setFont("6x8", 3);
+  buf.setFontAlign(0, 0);
+  buf.drawString(dateArray[4], 120, 120, true);
 
-    // draw digital time
-    buf.setFont("6x8", 3);
-    buf.setFontAlign(0, 0);
-    buf.drawString(dateArray[4], 120, 120, true);
+  // draw new minute hand
+  rotatePoint(0, Radius.min, minute * 6, Center, point);
+  buf.drawLine(Center.x, Center.y, point[0], point[1]);
+  buf.fillPoly(setLineWidth(Center.x, Center.y, point[0], point[1], Widths.minute));
+  // draw new hour hand
+  rotatePoint(0, Radius.hour, hour % 12 * 30 + date.getMinutes() / 2 | 0, Center, point);
+  buf.fillPoly(setLineWidth(Center.x, Center.y, point[0], point[1], Widths.hour));
 
-    // draw new minute hand
-    point = rotatePoint(0, Radius.min, minute * 6);
-    buf.drawLine(Center.x, Center.y, point[0], point[1]);
-    buf.fillPoly(setLineWidth(Center.x, Center.y, point[0], point[1], Widths.minute));
-    // draw new hour hand
-    point = rotatePoint(0, Radius.hour, hour % 12 * 30 + date.getMinutes() / 2 | 0);
-    buf.fillPoly(setLineWidth(Center.x, Center.y, point[0], point[1], Widths.hour));
+  // draw center
+  buf.fillCircle(Center.x, Center.y, Radius.center);
 
-    // draw center
-    buf.fillCircle(Center.x, Center.y, Radius.center);
+  g.drawImage({width:buf.getWidth(),height:buf.getHeight(),bpp:1,buffer:buf.buffer},0,24);
 
-    g.drawImage({width:buf.getWidth(),height:buf.getHeight(),bpp:1,buffer:buf.buffer},0,24);
+  if (timeoutId !== undefined) {
+    clearTimeout(timeoutId);
   }
-}
-
-Bangle.on('lcdPower', function(on) {
-  if (on)
-    drawMixedClock(true);
-    Bangle.drawWidgets();
-});
-
-setInterval(() => drawMixedClock(true), 30000); // force an update every 30s even screen is off
+  const period = (Bangle.isLCDOn() ? 1000 : 60000); // Update every second if display is on else every minute
+  let timeout = period - (Date.now() % period);
+  timeoutId = setTimeout(()=>{
+      timeoutId = undefined;
+      drawMixedClock();
+  }, timeout);
+};
+
+const onLCDPower = function(on) {
+    if (on) {
+      drawMixedClock();
+      Bangle.drawWidgets();
+    }
+};
+Bangle.on('lcdPower', onLCDPower);
+
+Bangle.setUI({mode:"clock", remove:function() {
+  if (timeoutId !== undefined) {
+    delete buf.buffer;
+    clearTimeout(timeoutId);
+    timeoutId = undefined;
+    Bangle.removeListener('lcdPower',onLCDPower);
+  }
+}});
 
 g.clear();
 Bangle.loadWidgets();
 Bangle.drawWidgets();
 drawMixedClock(); // immediately draw
-setInterval(drawMixedClock, 500); // update twice a second
-
-// Show launcher when middle button pressed after freeing memory first
-setWatch(() => {delete buf.buffer; Bangle.showLauncher()}, BTN2, {repeat:false,edge:"falling"});
+}
diff --git a/apps/miclock2/metadata.json b/apps/miclock2/metadata.json
index 094d0995a3..f177ab4c17 100644
--- a/apps/miclock2/metadata.json
+++ b/apps/miclock2/metadata.json
@@ -1,7 +1,7 @@
 {
   "id": "miclock2",
   "name": "Mixed Clock 2",
-  "version": "0.03",
+  "version": "0.04",
   "description": "White color variant of the Mixed Clock with thicker clock hands for better readability in the bright sunlight, extra space under the clock for widgets and seconds in the digital clock.",
   "icon": "clock-mixed.png",
   "type": "clock",