diff --git a/apps.json b/apps.json
index a7a74f4cb..a0bd5bfd0 100644
--- a/apps.json
+++ b/apps.json
@@ -4456,5 +4456,20 @@
     "storage": [
       {"name":"timecal.app.js","url":"timecal.app.js"}
     ]
+  },
+  {
+    "id":"intervalTimer",
+    "name":"Interval Timer",
+    "shortName":"Interval Timer",
+    "icon": "app.png",
+    "version":"0.01",
+    "description": "Interval Timer for workouts, HIIT, or whatever else.",
+    "tags": "timer, interval, hiit, workout",
+    "readme":"README.md",
+    "supports":["BANGLEJS2"],
+    "storage": [
+      {"name":"intervalTimer.app.js","url":"app.js"},
+      {"name":"intervalTimer.img","url":"app-icon.js","evaluate":true}
+    ]
   }
 ]
diff --git a/apps/intervalTimer/ChangeLog b/apps/intervalTimer/ChangeLog
new file mode 100644
index 000000000..d62860265
--- /dev/null
+++ b/apps/intervalTimer/ChangeLog
@@ -0,0 +1 @@
+0.01: First Release
\ No newline at end of file
diff --git a/apps/intervalTimer/README.md b/apps/intervalTimer/README.md
new file mode 100644
index 000000000..f56dd74d2
--- /dev/null
+++ b/apps/intervalTimer/README.md
@@ -0,0 +1,34 @@
+# Interval Timer
+
+An interval timer for workouts and whatever else!
+
+## Usage
+
+First set the active time (i.e. the number of seconds to perform exercises).
+
+![Set Active Time](images\set-active.png)
+
+Next set the rest time (i.e. number of seconds to rest between exercises).
+
+![Set Rest Time](images\set-rest.png)
+
+Finally choose the number of sets to perform.
+
+![Set Number Sets](images\set-sets.png)
+
+Active time will be shown in red, rest time in green. The watch will buzz whenever active or rest time gets to 0.
+
+![Timer (active)](images\timer1.png)
+![Timer (rest)](images\timer2.png)
+
+You can press the physical button during timer countdown to pause the timer.
+
+![Paused](images\pause.png)
+
+View after all sets are completed. Press menu to change settings or restart to start timer again with the same settings.
+
+![Completed view](images\done.png)
+
+## Creator
+
+James Gough
diff --git a/apps/intervalTimer/app-icon.js b/apps/intervalTimer/app-icon.js
new file mode 100644
index 000000000..1ca594050
--- /dev/null
+++ b/apps/intervalTimer/app-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwg96hWq1WgDCgXWxGZzOICqQABC4QABCyIXFDBsICIeJyfznAFBwAWPC4Of///mYYMCwgXBl4XB/4xCFxwABn4XCDAQwICw2ICwf/+YwJxGDHoQXHGARGIn/4C5QwBJAwQDC5QLCIw6GEC5BIGIwQLBJAgXGJAwXEJAgXPHgoXIEYIXFLwRIFC484C4h2DJAoIFPA+Ix4MGAAJoDHYgXKf4QXUJAYJGC5p5CF6hIBO44XNABIXGEw4AIU4rXFC5jvFc5AAHxAXGQwwAHQAIXcPCB2FC4RgOB4IXFJBxGHJB5GHJAYwKFwIXIJAIwKFwJGHGAYYICwIuIGAeImYWFmYJBFxIYEwZjC+YtCCxZJDAA4WMDBIWODIwVRAH4AXA=="))
\ No newline at end of file
diff --git a/apps/intervalTimer/app.png b/apps/intervalTimer/app.png
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diff --git a/apps/intervalTimer/images/done.png b/apps/intervalTimer/images/done.png
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index 000000000..d210540d1
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diff --git a/apps/intervalTimer/images/pause.png b/apps/intervalTimer/images/pause.png
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index 000000000..727380799
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diff --git a/apps/intervalTimer/images/set-active.png b/apps/intervalTimer/images/set-active.png
new file mode 100644
index 000000000..75b86150b
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diff --git a/apps/intervalTimer/images/set-rest.png b/apps/intervalTimer/images/set-rest.png
new file mode 100644
index 000000000..e33c9eb02
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diff --git a/apps/intervalTimer/images/set-sets.png b/apps/intervalTimer/images/set-sets.png
new file mode 100644
index 000000000..3d5a9107f
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diff --git a/apps/intervalTimer/images/timer1.png b/apps/intervalTimer/images/timer1.png
new file mode 100644
index 000000000..3d1cb6350
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diff --git a/apps/intervalTimer/images/timer2.png b/apps/intervalTimer/images/timer2.png
new file mode 100644
index 000000000..026774ba2
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diff --git a/apps/intervalTimer/intervalTimer.app.js b/apps/intervalTimer/intervalTimer.app.js
new file mode 100644
index 000000000..fd57dbe2b
--- /dev/null
+++ b/apps/intervalTimer/intervalTimer.app.js
@@ -0,0 +1,306 @@
+/** 
+
+Interval Timer
+
+An app for the Bangle.js watch
+
+*/
+
+var Layout = require("Layout");
+
+// Globals
+var timerMode; // 'active' || 'rest'
+var numSets = 1;
+var activeTime = 20;
+var restTime = 10;
+var counter;
+var setsRemaining;
+var counterInterval;
+var outOfTimeTimeout;
+var timerIsPaused;
+var timerLayout;
+
+/** Called to initialize the timer layout */
+function initTimerLayout() {
+  timerLayout = new Layout( {
+    type:"v", c: [
+      {type:"txt", font:"40%", pad: 10, label:"00:00", id:"time" },
+      {type:"txt", font:"6x8:2", label:"0", id:"set" }
+      ]
+    }, {btns: [
+      {label: "Stop", cb: l => {
+          if (timerIsPaused){
+            timerIsPaused = false;
+            resumeTimer();
+          }
+          else{
+            timerIsPaused = true;
+            pauseTimer(); 
+          }
+        }
+      }
+    ]
+  });
+}
+
+/** Pauses the timer by clearing the counterInterval */
+function pauseTimer() {
+  if (counterInterval){
+    clearTimeout(counterInterval);
+    counterInterval = undefined;
+  }
+  // update layout to display "Paused"
+  timerLayout.clear(timerLayout.time);
+  timerLayout.time.label = "||";
+  timerLayout.clear(timerLayout.set);
+  timerLayout.set.label = "Paused";
+  timerLayout.render();
+}
+
+/** Reumes the timer by setting the counterInterval again */
+function resumeTimer() {
+  if (!counterInterval){
+    counterInterval = setInterval(countDown, 1000);
+  }
+  // display the timer values again.
+  timerLayout.clear(timerLayout.time);
+  timerLayout.time.label = counter;
+  timerLayout.clear(timerLayout.set);
+  timerLayout.set.label = `Sets: ${setsRemaining}`;
+  timerLayout.render();
+}
+
+/** Display 'Done' view, called when all sets are completed */
+function outOfTime() {
+  var stopLayout = new Layout( {
+  type:"v", c: [
+    {type:"txt", font:"30%", label:"Done!", id:"time" },
+  ]
+  }, {btns: [
+    // menu button allows user to modify times and sets
+    {label:"Menu", cb: l=> {
+        if (outOfTimeTimeout){
+          clearTimeout(outOfTimeTimeout);
+          outOfTimeTimeout = undefined;
+        }
+        //stopLayout.remove();
+        setup();
+      }
+    },
+    // restart button runs timer again with the same settings
+    {label:"Restart", cb: l=> {
+      if (outOfTimeTimeout){
+        clearTimeout(outOfTimeTimeout);
+        outOfTimeTimeout = undefined;
+      }
+      //stopLayout.remove();
+      timerMode = 'active';
+      startTimer();
+    }
+  }
+  ]});
+
+  if (counterInterval) return;
+  setsRemaining = numSets;
+  g.clear();
+  stopLayout.render();
+  Bangle.buzz(500);
+  Bangle.beep(200, 4000)
+    .then(() => new Promise(resolve => setTimeout(resolve,200)))
+    .then(() => Bangle.beep(200, 3000));
+}
+
+/** Function called by the counterInterval at each second.
+  Updates the timer display values.
+*/
+function countDown() {
+  // Out of time
+  if (counter<=0) {
+    if(timerMode === 'active'){
+      timerMode = 'rest';
+      startTimer();
+      return;
+    }
+    else{
+      --setsRemaining;
+      if (setsRemaining === 0){
+        clearInterval(counterInterval);
+        counterInterval = undefined;
+        //setWatch(startTimer, (process.env.HWVERSION==2) ? BTN1 : BTN2);
+        outOfTime();
+        return;
+      }
+      timerMode = 'active';
+      startTimer();
+      return;
+    }
+  }
+
+  timerLayout.clear(timerLayout.time);
+  timerLayout.time.label = counter;
+  timerLayout.render();
+  counter--;
+}
+
+/** Start the interval timer. */
+function startTimer() {
+  timerIsPaused = false;
+  g.clear();
+  if(timerMode === 'active'){
+    counter = activeTime;
+    timerLayout.time.col = '#f00';
+  }
+  else{
+    counter = restTime;
+    timerLayout.time.col = '#0f0';
+  }
+
+  timerLayout.clear(timerLayout.set);
+  timerLayout.set.label = `Sets: ${setsRemaining}`;
+  timerLayout.render();
+  Bangle.buzz();
+  countDown();
+  if (!counterInterval){
+    counterInterval = setInterval(countDown, 1000);
+  }
+}
+
+/** Menu step in which user sets the number of sets to be performed. */
+function setNumSets(){
+  g.clear();
+  var menuLayout = new Layout( {
+  type:"v", c: [
+    {type:"txt", font:"6x8:2", label:"Number Sets", id:"title" },
+    {type:"txt", font:"30%", pad: 20, label: numSets, id:"value" },
+        {type:"btn", font:"6x8:2", label:"Back", cb: l => {
+        setRestTime();
+      }
+    }
+  ]
+  }, {btns: [
+      {label:"+", cb: l=> {
+        incrementNumSets();
+      }},
+      {label:"Go", cb: l=> {
+        setsRemaining = numSets;
+        initTimerLayout();
+        startTimer();
+      }},
+      {label:"-", cb: l=>{
+        decrementNumSets();
+      }}
+  ]});
+  menuLayout.render();
+
+  const incrementNumSets = () => {
+      ++numSets;
+      menuLayout.clear(menuLayout.numSets);
+      menuLayout.value.label = numSets;
+      menuLayout.render();
+  };
+
+  const decrementNumSets = () => {
+      if(numSets === 1){
+        return; 
+      }
+      --numSets;
+      menuLayout.clear(menuLayout.numSets);
+      menuLayout.value.label = numSets;
+      menuLayout.render();
+  };
+}
+
+/** Menu step in which user sets the number of seconds of rest time for each set. */
+function setRestTime(){
+  g.clear();
+  var menuLayout = new Layout( {
+  type:"v", c: [
+    {type:"txt", font:"6x8:2", label:"Rest Time", id:"title" },
+    {type:"txt", font:"30%", pad: 20, label: restTime, id:"value" },
+    {type:"btn", font:"6x8:2", label:"Back", cb: l => {
+        setActiveTime();
+      }
+    }
+  ]
+  }, {btns: [
+      {label:"+", cb: l=> {
+        incrementRestTime();
+      }},
+      {label:"OK", cb: l=>setNumSets()},
+      {label:"-", cb: l=>{
+        decrementRestTime();
+      }}
+  ]});
+  menuLayout.render();
+
+  const incrementRestTime = () => {
+      restTime += 5;
+      menuLayout.clear(menuLayout.restTime);
+      menuLayout.value.label = restTime;
+      menuLayout.render();
+  };
+
+  const decrementRestTime = () => {
+      if(restTime === 0){
+        return; 
+      }
+      restTime -= 5;
+      menuLayout.clear(menuLayout.restTime);
+      menuLayout.value.label = restTime;
+      menuLayout.render();
+  };
+}
+
+/** Menu step in which user sets the number of seconds of active time for each set. */
+function setActiveTime(){
+  g.clear();
+  var menuLayout = new Layout( {
+  type:"v", c: [
+    {type:"txt", font:"6x8:2", label:"Active Time", id:"title" },
+    {type:"txt", font:"30%", pad: 20, label: activeTime, id:"value" }
+  ]
+  }, {btns: [
+      {font:"20%", label:"+", fillx:1, cb: l=> {
+        incrementActiveTime();
+      }},
+      {label:"OK", cb: l => setRestTime()},
+      {type:"btn", font:"20%", label:"-", fillx:1, cb: l=> {
+        decrementActiveTime();
+      }
+    }
+  ]});
+  menuLayout.render();
+
+  const incrementActiveTime = () => {
+      activeTime += 5;
+      menuLayout.clear(menuLayout.activeTime);
+      menuLayout.value.label = activeTime;
+      menuLayout.render();
+  };
+
+  const decrementActiveTime = () => {
+      if(activeTime === 0){
+        return; 
+      }
+      activeTime -= 5;
+      menuLayout.clear(menuLayout.activeTime);
+      menuLayout.value.label = activeTime;
+      menuLayout.render();
+  };
+}
+
+/** Start the setup menu, walks through setting active time, rest time, and number of sets. */
+function setup(){
+  if (timerLayout){
+    // remove timerLayout, otherwise it's pause button callback will still be registered
+    timerLayout.remove(timerLayout);
+    timerLayout = undefined;
+  }
+  Bangle.setUI(); // remove all existing input handlers
+  timerMode = 'active';
+  setActiveTime();
+}
+
+// this keeps the watch LCD lit up
+Bangle.setLCDPower(1);
+setup();
\ No newline at end of file