diff --git a/apps.json b/apps.json
index 688518bb0..b1963974b 100644
--- a/apps.json
+++ b/apps.json
@@ -2238,7 +2238,6 @@
       {"name":"worldclock.img","url":"worldclock-icon.js","evaluate":true}
   ]
  },
-
 { "id": "digiclock",
   "name": "Digital Clock Face",
   "shortName":"Digi Clock",
@@ -2264,5 +2263,18 @@
       {"name":"dsdrelay.app.js","url":"dsdrelay.app.js"},
       {"name":"dsdrelay.img","url":"dsdrelay-icon.js","evaluate":true}
     ]
+  },
+  { "id": "mandel",
+    "name": "Mandelbrot",
+    "shortName":"Mandel",
+    "icon": "mandel.png",
+    "version":"0.01",
+    "description": "Draw a zoomable Mandelbrot set",
+    "tags": "game",
+    "readme": "README.md",
+    "storage": [
+      {"name":"mandel.app.js","url":"mandel.min.js"},
+      {"name":"mandel.img","url":"mandel-icon.js","evaluate":true}
+    ]
   }
 ]
diff --git a/apps/mandel/README.md b/apps/mandel/README.md
new file mode 100644
index 000000000..de8148b53
--- /dev/null
+++ b/apps/mandel/README.md
@@ -0,0 +1,7 @@
+# Mandel
+
+Draw a colored rendition of the famous Mandelbrot set. Pushing button 2 activates zoom mode: the top and left edge of the zoom region can be moved up/down
+with buttons 1 and 3 and left/right by touching the screen left right. Pushing button 2 again allows movement of the bottom and right edge in the same manner.
+Pushing button 2 a third time renders the selected region full screen.
+
+The code uses inlined C code for perfomance reasons. Full source is provided on github.
diff --git a/apps/mandel/mandel-icon.js b/apps/mandel/mandel-icon.js
new file mode 100644
index 000000000..2c09ad91b
--- /dev/null
+++ b/apps/mandel/mandel-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwkA/4A/AEGIACQX/C/4X3x4XX/AXV/4XsBoYYFC6IPFC5gWFGAgXSDAgXIXAYXGF5mPA4ICCF6QUGC5wWKI5YVKR5ovWL7CPZX6zvXC5KPMDBYXVFwgXOB4QWFC9GPC65pKC5aBLC/4X/C54A/ADo"))
diff --git a/apps/mandel/mandel.app.js b/apps/mandel/mandel.app.js
new file mode 100644
index 000000000..e6d8c766e
--- /dev/null
+++ b/apps/mandel/mandel.app.js
@@ -0,0 +1,192 @@
+
+var aux = new Float32Array(8);
+var p_aux = E.getAddressOf(aux, true);
+aux[0] = -2;
+aux[1] = -1.5;
+aux[2] = 1;
+aux[3] = 1.5;
+
+var buf_height = 40;
+
+var frameX1=0, frameX2=239, frameY1=0, frameY2=239;
+var frameCorner = 0;
+
+var imbuf = Graphics.createArrayBuffer(240, buf_height, 16);
+var imbufaddr = E.getAddressOf(imbuf.buffer, true);
+var mimg = {
+  width :imbuf.getWidth(),
+  height:imbuf.getHeight(),
+  bpp   :16,
+  buffer:imbuf.buffer
+};
+
+var c = E.compiledC(`
+// void mandel(int, int)
+union shortbytes {
+  short s;
+  char b[2];
+};
+void mandel(float *p, short *ib) {
+  float mincx = p[0];
+  float mincy = p[1];
+  float maxcx = p[2];
+  float maxcy = p[3];
+  int minx = (int)p[4];
+  int miny = (int)p[5];
+  int maxx = (int)p[6];
+  int maxy = (int)p[7];
+  int pib = 0;
+  for (int y=miny; y<maxy; ++y) 
+    for (int x=minx; x<maxx; ++x) {
+      float cr = mincx+(maxcx-mincx)*x/240.0;
+      float ci = mincy+(maxcy-mincy)*y/240.0;
+      float zr=0, zi=0;
+      char niter = 31;
+      while (--niter && zr>-2 && zr<1 && zi>-1.5 && zi<1.5) {
+        float nr = zr*zr-zi*zi + cr;
+        zi = 2*zr*zi + ci;
+        zr = nr;
+      }
+      union shortbytes c, d;
+      c.s = niter | (niter << 7)&0x7ff | (niter<<13)&0xffff;
+      d.b[0] = c.b[1];
+      d.b[1] = c.b[0];
+      ib[pib++] = d.s;
+    }
+}
+`);
+
+function drawRectangle(x1, y1, x2, y2) {
+  if (frameCorner==1) g.setColor(1, 0, 0);
+  else g.setColor(1, 1, 1);
+  g.drawLine(x1, y1, x2, y1).drawLine(x1, y1, x1, y2);
+  if (frameCorner==2) g.setColor(1, 0, 0);
+  else g.setColor(1, 1, 1);
+  g.drawLine(x1, y2, x2, y2).drawLine(x2, y1, x2, y2);
+}
+
+function restoreRow(y) {
+  mimg.width = 240;
+  mimg.height = 1;
+  aux[4] = 0;
+  aux[5] = y;
+  aux[6] = 240;
+  aux[7] = y+1;
+  c.mandel(p_aux, imbufaddr);
+  g.drawImage(mimg, 0, y);
+}
+
+function restoreCol(x) {
+  mimg.width = 1;
+  mimg.height = 240;
+  aux[4] = x;
+  aux[5] = 0;
+  aux[6] = x+1;
+  aux[7] = 240;
+  c.mandel(p_aux, imbufaddr);
+  g.drawImage(mimg, x, 0);
+}
+
+function moveUp() {
+  restoreCol(frameX1);
+  restoreCol(frameX2);
+  if (frameCorner==1 && frameY1>3) {
+    restoreRow(frameY1);
+    frameY1 -= 4;
+  }
+  if (frameCorner==2 && frameY2>3) {
+    restoreRow(frameY2);
+    frameY2 -= 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveDown() {
+  restoreCol(frameX1);
+  restoreCol(frameX2);
+  if (frameCorner==1 && frameY1<235) {
+    restoreRow(frameY1);
+    frameY1 += 4;
+  }
+  if (frameCorner==2 && frameY2<235) {
+    restoreRow(frameY2);
+    frameY2 += 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveRight() {
+  restoreRow(frameY1);
+  restoreRow(frameY2);
+  if (frameCorner==1 && frameX1<235) {
+    restoreCol(frameX1);
+    frameX1 += 4;
+  }
+  if (frameCorner==2 && frameX2<235) {
+    restoreCol(frameX2);
+    frameX2 += 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveLeft() {
+  restoreRow(frameY1);
+  restoreRow(frameY2);
+  if (frameCorner==1 && frameX1>3) {
+    restoreCol(frameX1);
+    frameX1 -= 4;
+  }
+  if (frameCorner==2 && frameX2>3) {
+    restoreCol(frameX2);
+    frameX2 -= 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+
+function toggleFrame() {
+  if (frameCorner<2) {
+    frameCorner++;
+    drawRectangle(frameX1, frameY1, frameX2, frameY2);
+  }
+  else {
+    frameCorner = 0;
+    var mincx = aux[0] + (aux[2]-aux[0])*frameX1/240.0;
+    var maxcx = aux[0] + (aux[2]-aux[0])*frameX2/240.0;
+    var mincy = aux[1] + (aux[3]-aux[1])*frameY1/240.0;
+    var maxcy = aux[1] + (aux[3]-aux[1])*frameY2/240.0;
+    aux[0] = mincx;
+    aux[1] = mincy;
+    aux[2] = maxcx;
+    aux[3] = maxcy;
+    drawIt();
+  }
+}
+
+setWatch(toggleFrame, BTN2, {repeat: true});
+setWatch(moveUp, BTN1, {repeat: true});
+setWatch(moveDown, BTN3, {repeat: true});
+Bangle.on('touch', function(button) {
+  switch(button) {
+    case 1: moveLeft(); break;
+    case 2: moveRight(); break;
+  }
+});
+
+
+function drawIt() {
+  aux[4] = 0;
+  aux[5] = 0;
+  aux[6] = 240;
+  aux[7] = buf_height;
+  mimg.width = 240;
+  mimg.height = buf_height;
+  for (var y=0; y<240/buf_height; ++y) {
+    c.mandel(p_aux, imbufaddr);
+    aux[5] += buf_height;
+    aux[7] += buf_height;
+    g.drawImage(mimg, 0, y*buf_height);
+  }
+}
+
+setTimeout(drawIt, 50);
diff --git a/apps/mandel/mandel.info b/apps/mandel/mandel.info
new file mode 100644
index 000000000..d4cddbc56
--- /dev/null
+++ b/apps/mandel/mandel.info
@@ -0,0 +1 @@
+{"id":"mandel","name":"Mandel","src":"mandel.app.js","icon":"mandel.img"}
\ No newline at end of file
diff --git a/apps/mandel/mandel.min.js b/apps/mandel/mandel.min.js
new file mode 100644
index 000000000..0a1bd5fcd
--- /dev/null
+++ b/apps/mandel/mandel.min.js
@@ -0,0 +1,163 @@
+
+var aux = new Float32Array(8);
+var p_aux = E.getAddressOf(aux, true);
+aux[0] = -2;
+aux[1] = -1.5;
+aux[2] = 1;
+aux[3] = 1.5;
+
+var buf_height = 40;
+
+var frameX1=0, frameX2=239, frameY1=0, frameY2=239;
+var frameCorner = 0;
+
+var imbuf = Graphics.createArrayBuffer(240, buf_height, 16);
+var imbufaddr = E.getAddressOf(imbuf.buffer, true);
+var mimg = {
+  width :imbuf.getWidth(),
+  height:imbuf.getHeight(),
+  bpp   :16,
+  buffer:imbuf.buffer
+};
+
+var c = (function(){
+  var bin=atob("0O0EepDtAFrQ7QFK0O0COpDtAzqf7URK/e7nei3p8EMX7pBa0O0Fev3u53rF68V8F+6QStDtBnr97ud6ACMX7pCK0O0Hev3u53q47gAqF+6QmvfuABq/7ggaTEVi2gzrAwaeRgHrRgYqRvfuCCqu6wUDQkUTRETaB+4QKnPuxXq47sd6HyNn7od6B+4QSsfuhGq47sd6c+5kenbuhWpn7od6n+0iesfuhFrw7kd6de6kWgE7E/D/AxPQ9O7CevHuEPoO3fTu4Xrx7hD6CdW07sF68e4Q+gTdtO7ievHuEPoR1NgBwPMKAEPqQzMDQ8PzByBg8wcHY/MPJyb4EnABMrXnATSp5yfuR2rw7mUKp+6nanfup3rn7icKdu4merDuYHrG573o8IMAAHBDAAAAAA==");
+  return {
+    mandel:E.nativeCall(1, "void(int, int)", bin),
+  };
+})();
+
+function drawRectangle(x1, y1, x2, y2) {
+  if (frameCorner==1) g.setColor(1, 0, 0);
+  else g.setColor(1, 1, 1);
+  g.drawLine(x1, y1, x2, y1).drawLine(x1, y1, x1, y2);
+  if (frameCorner==2) g.setColor(1, 0, 0);
+  else g.setColor(1, 1, 1);
+  g.drawLine(x1, y2, x2, y2).drawLine(x2, y1, x2, y2);
+}
+
+function restoreRow(y) {
+  mimg.width = 240;
+  mimg.height = 1;
+  aux[4] = 0;
+  aux[5] = y;
+  aux[6] = 240;
+  aux[7] = y+1;
+  c.mandel(p_aux, imbufaddr);
+  g.drawImage(mimg, 0, y);
+}
+
+function restoreCol(x) {
+  mimg.width = 1;
+  mimg.height = 240;
+  aux[4] = x;
+  aux[5] = 0;
+  aux[6] = x+1;
+  aux[7] = 240;
+  c.mandel(p_aux, imbufaddr);
+  g.drawImage(mimg, x, 0);
+}
+
+function moveUp() {
+  restoreCol(frameX1);
+  restoreCol(frameX2);
+  if (frameCorner==1 && frameY1>3) {
+    restoreRow(frameY1);
+    frameY1 -= 4;
+  }
+  if (frameCorner==2 && frameY2>3) {
+    restoreRow(frameY2);
+    frameY2 -= 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveDown() {
+  restoreCol(frameX1);
+  restoreCol(frameX2);
+  if (frameCorner==1 && frameY1<235) {
+    restoreRow(frameY1);
+    frameY1 += 4;
+  }
+  if (frameCorner==2 && frameY2<235) {
+    restoreRow(frameY2);
+    frameY2 += 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveRight() {
+  restoreRow(frameY1);
+  restoreRow(frameY2);
+  if (frameCorner==1 && frameX1<235) {
+    restoreCol(frameX1);
+    frameX1 += 4;
+  }
+  if (frameCorner==2 && frameX2<235) {
+    restoreCol(frameX2);
+    frameX2 += 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+function moveLeft() {
+  restoreRow(frameY1);
+  restoreRow(frameY2);
+  if (frameCorner==1 && frameX1>3) {
+    restoreCol(frameX1);
+    frameX1 -= 4;
+  }
+  if (frameCorner==2 && frameX2>3) {
+    restoreCol(frameX2);
+    frameX2 -= 4;
+  }
+  drawRectangle(frameX1, frameY1, frameX2, frameY2);
+}
+
+
+function toggleFrame() {
+  if (frameCorner<2) {
+    frameCorner++;
+    drawRectangle(frameX1, frameY1, frameX2, frameY2);
+  }
+  else {
+    frameCorner = 0;
+    var mincx = aux[0] + (aux[2]-aux[0])*frameX1/240.0;
+    var maxcx = aux[0] + (aux[2]-aux[0])*frameX2/240.0;
+    var mincy = aux[1] + (aux[3]-aux[1])*frameY1/240.0;
+    var maxcy = aux[1] + (aux[3]-aux[1])*frameY2/240.0;
+    aux[0] = mincx;
+    aux[1] = mincy;
+    aux[2] = maxcx;
+    aux[3] = maxcy;
+    drawIt();
+  }
+}
+
+setWatch(toggleFrame, BTN2, {repeat: true});
+setWatch(moveUp, BTN1, {repeat: true});
+setWatch(moveDown, BTN3, {repeat: true});
+Bangle.on('touch', function(button) {
+  switch(button) {
+    case 1: moveLeft(); break;
+    case 2: moveRight(); break;
+  }
+});
+
+
+function drawIt() {
+  aux[4] = 0;
+  aux[5] = 0;
+  aux[6] = 240;
+  aux[7] = buf_height;
+  mimg.width = 240;
+  mimg.height = buf_height;
+  for (var y=0; y<240/buf_height; ++y) {
+    c.mandel(p_aux, imbufaddr);
+    aux[5] += buf_height;
+    aux[7] += buf_height;
+    g.drawImage(mimg, 0, y*buf_height);
+  }
+}
+
+setTimeout(drawIt, 50);