diff --git a/apps.json b/apps.json
index a374c74ef..bf0249bb1 100644
--- a/apps.json
+++ b/apps.json
@@ -2021,7 +2021,7 @@
     "name": "Vertical watch face",
     "shortName":"Vertical Face",
     "icon": "app.png",
-    "version":"0.07",
+    "version":"0.08",
     "description": "A simple vertical watch face with the date. Heart rate monitor is toggled with BTN1",
     "tags": "clock",
     "type":"clock",
@@ -2661,5 +2661,17 @@
     {"name":"mclockplus.app.js","url":"mclockplus.app.js"},
     {"name":"mclockplus.img","url":"mclockplus-icon.js","evaluate":true}
   ]
+},
+{ "id": "intervals",
+  "name": "Intervals App",
+  "shortName":"Intervals",
+  "icon": "intervals.png",
+  "version":"0.01",
+  "description": "Intervals for training. It is possible to configure work time and rest time and number of sets.",
+  "tags": "",
+  "storage": [
+    {"name":"intervals.app.js","url":"intervals.app.js"},
+    {"name":"intervals.img","url":"intervals-icon.js","evaluate":true}
+  ]
 }
 ]
diff --git a/apps/gpsservice/ChangeLog.txt b/apps/gpsservice/ChangeLog
similarity index 100%
rename from apps/gpsservice/ChangeLog.txt
rename to apps/gpsservice/ChangeLog
diff --git a/apps/intervals/README.md b/apps/intervals/README.md
new file mode 100644
index 000000000..63a483f4f
--- /dev/null
+++ b/apps/intervals/README.md
@@ -0,0 +1,6 @@
+# Intervals app
+Just my first app to test this amazing smartwatch.
+
+The idea is to create a simple app which allows to define a workout, being able to configure the work time, rest time and number of sets. Try it out, it is quite simple.
+
+This is obviously version 0.01 but it should work.
\ No newline at end of file
diff --git a/apps/intervals/intervals-icon.js b/apps/intervals/intervals-icon.js
new file mode 100644
index 000000000..d901489c2
--- /dev/null
+++ b/apps/intervals/intervals-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwg96xAWVhGIwAuWGCoXrCIZfFDZkJyAKTAAOZBaojEzIADGBoOChITEAgIUCGBAhCCwIlFA4YwIhIjCDQYtDAoIMBQhgUCzJMDR5xYGFwSPMHwYRED4KPMCQcIxKtHWApoCEYczmYXCPgYAEGgZGCAgMDC4pEGA4gVBGwIWCF6GqhWgC4kqBYYAGGgegC4QWCC4kKI4oQBC4guEC4wJDC4gtBGoIXDmWqBoQMBBQUwIAQXJKopSDJooXGmQRBBwYLBFgR2EC4QAEC4RIDToRQDC56pESYhHDAAYFBA4YvMD4oOEL5bMGaJIQFC5ZiEAoxRCC5I1KJoIXVBYJ4FEYgAGPAwwHSYIAGJAwwHEA5+HB5AvMZI4XKBwu72ELAQIHCAoQCBchQMCAQIADDgIfEDBYRBAAI5DCxYUDAxYYMAAgWPDIoVSAFAA=="))
\ No newline at end of file
diff --git a/apps/intervals/intervals.app.js b/apps/intervals/intervals.app.js
new file mode 100644
index 000000000..da436b104
--- /dev/null
+++ b/apps/intervals/intervals.app.js
@@ -0,0 +1,167 @@
+var counter;
+var counterInterval;
+
+var settings;
+
+var work=false; //true if training false if resting
+var prep=true; //true if we are in prep phase (at the beginning of the session
+var setNum;
+
+var paused;
+
+function endPart() {
+  g.clear();
+  if (prep){
+    prep=false;
+    work = true;
+    counter = settings.workseg+settings.workmin*60;
+    startCounter();
+  }else if (work){
+    work = false;
+    counter = settings.restseg+settings.restmin*60;
+    startCounter();
+  }
+  else{
+    if (setNum>1)
+    {
+      setNum--;
+      work = true;
+      counter = settings.workseg+settings.workmin*60;
+      startCounter();
+    }
+    else
+    {
+       //End session
+      setWatch(showMenu, BTN2);
+      E.showMessage("Press BTN2 for\ngoing back\nto the menu","Well done!");
+    }
+  }
+}
+
+function printCounter(counter){
+  g.setFontAlign(0,0); // center font
+  g.setFont("Vector",80); // vector font, 80px  
+  // draw the current counter value
+  let minutes = Math.floor(counter/60);
+  let segs = counter % 60;
+  let textMinutes = minutes.toString().padStart(2, "0");
+  let textSegs = segs.toString().padStart(2,"0");
+  g.clearRect(0,80,239,160);
+  g.setFont("Vector",30);
+  if (prep)
+    g.setColor(125,125,0);
+  else if (work)
+    g.setColor(255,0,0);
+  else
+    g.setColor(0,255,0);
+  g.drawString(setNum,120,50);
+  if (prep)
+    g.drawString("PREPARATION",120,190);
+  else if (work)
+    g.drawString("WORK",120,190);
+  else
+    g.drawString("REST",120,190);
+  g.setFont("Vector",10);
+  g.drawString("Touch to pause",120,215);
+  g.setFont("Vector",80); 
+  g.drawString(textMinutes+":"+textSegs,120,120);
+}
+
+function signal_to_user(le){
+  if (settings.buzz)
+    Bangle.buzz(le);
+  else
+    Bangle.beep(le,4000);
+}
+
+function countDown() {
+  counter--;
+  if (counter<4 && counter>0)
+    signal_to_user(200);
+  if (counter==0)
+    signal_to_user(600);
+
+  if (counter<0) {
+    clearInterval(counterInterval);
+    counterInterval = undefined;
+    endPart();
+  }
+  else
+  {
+    printCounter(counter);
+  }
+  g.flip();
+}
+
+function startCounter(){
+  if (!counterInterval)
+    counterInterval = setInterval(countDown, 1000);
+}
+
+function pause()
+{
+  if (!paused)
+  {
+    clearInterval(counterInterval);
+    counterInterval = undefined;
+    setWatch(resume,BTN4);
+    setWatch(resume,BTN5);
+    paused=true;
+    g.clear();
+    g.setFont("Vector",60);
+    g.drawString("PAUSED",120,120);
+    g.setFont("Vector",20);
+    g.drawString("Touch to continue",120,180);
+  }
+}
+
+function resume(){
+  if (paused)
+  {
+    g.clear();
+    counterInterval = setInterval(countDown, 1000);
+    setWatch(pause,BTN4);
+    setWatch(pause,BTN5);
+    paused=false;
+  }
+}
+
+function startSession() {
+  E.showMenu();
+  paused=false;
+  setWatch(pause,BTN4);
+  setWatch(pause,BTN5);
+  require('Storage').write('intervals.settings.json',settings);
+  setNum = settings.sets;
+  counter = 5;//prep time
+  prep=true;
+  work=false;
+  startCounter();
+}
+
+function showMenu()
+{
+  settings = require('Storage').readJSON('intervals.settings.json',1)||
+      { sets:1,workseg:10,workmin:0,restseg:5,restmin:0,buzz:true};
+
+  var mainmenu = {
+  "" : { "title" : "-- Main Menu --" },
+  "START" : function() { startSession(); },
+  "Sets" : { value : settings.sets,min:0,max:20,step:1,onchange : v => { settings.sets=v; } },
+  "Work minutes" : { value : settings.workmin,min:0,max:59,step:1,onchange : v => { settings.workmin=v; } },
+  "Work seconds" : { value : settings.workseg,min:0,max:59,step:5,onchange : v => { settings.workseg=v; } },
+  "Rest minutes" : { value : settings.restmin,min:0,max:59,step:1,onchange : v => { settings.restmin=v; } },
+  "Rest seconds" : { value : settings.restseg,min:0,max:59,step:5,onchange : v => { settings.restseg=v; } },
+  "Signal type" :  { value : settings.buzz,format : v => v?"Buzz":"Beep",onchange : v => { settings.buzz=v; }}
+  };
+  
+  E.showMenu(mainmenu);
+}
+
+showMenu();
+
+
+
+
+
+
diff --git a/apps/intervals/intervals.png b/apps/intervals/intervals.png
new file mode 100644
index 000000000..f6ca9ff41
Binary files /dev/null and b/apps/intervals/intervals.png differ
diff --git a/core b/core
index f9020126e..1b1293a5e 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit f9020126eebd81abef204c6771914ff2c31160a1
+Subproject commit 1b1293a5eb9b8bb9e4f743c4599f0587f597d368
diff --git a/css/main.css b/css/main.css
index 8e91aec3d..0dbe8da14 100644
--- a/css/main.css
+++ b/css/main.css
@@ -32,3 +32,6 @@
   top: 36px;
   left: -24px;
 }
+.btn-favourite {
+  color: red;
+}