diff --git a/apps/hassio/ChangeLog b/apps/hassio/ChangeLog
new file mode 100644
index 000000000..2286a7f70
--- /dev/null
+++ b/apps/hassio/ChangeLog
@@ -0,0 +1 @@
+0.01: New App!
\ No newline at end of file
diff --git a/apps/hassio/README.md b/apps/hassio/README.md
new file mode 100644
index 000000000..7416bd90a
--- /dev/null
+++ b/apps/hassio/README.md
@@ -0,0 +1,41 @@
+# Home Assistant API Interface
+
+This app provides two features:
+
+- Sending health, compass, accelerator, and battery information to [Home Assistant](https://www.home-assistant.io/)
+- Displaying [Home Assistant](https://www.home-assistant.io/) templates
+
+This is done through rest api calls to your [Home Assistant](https://www.home-assistant.io/) server. This means the app requires using the [Android Integration](/?id=android) and for your server to be accessible from your phone.
+
+A restart may be required after loading the app to start the background sensor process.
+
+## Configuration
+
+Configuration is done through modifying the settings json.
+
+```json
+{
+  "templates": [
+    {
+      "name":"Test Template",
+      "temp":"Test"
+    }
+  ],
+  "interval": 180000,
+  "api_key":"api_key",
+  "host":"https://homeassistant:8123",
+  "id":"banglejs",
+  "friendly_name":"Banglejs Sensors"
+}
+```
+
+- `api_key`: A [Home Assistant](https://www.home-assistant.io/) [api key](https://developers.home-assistant.io/docs/api/rest/).
+- `host`: The url of your [Home Assistant](https://www.home-assistant.io/) server. The url must be https or it will not work. This is a limitation of the permissions given to the Banglejs GadgetBridge app. You can compile a custom version if you wish to modify this.
+- `interval`: The sensor update interval.
+- `id`: An id to be used for identifying your banglejs in [Home Assistant](https://www.home-assistant.io/).
+- `friendly_name`: The name [Home Assistant](https://www.home-assistant.io/) will use to refer to your banglejs.
+- `templates`: A list of templates to display in the gui. They are given in this format `{"name":"Template Name", "temp":"A template"}`. More information about creating templates can be found [here](https://www.home-assistant.io/docs/configuration/templating/).
+
+## The GUI
+
+The GUI will display templates one at a time. Tap to go to the next template. Long press to reload the current template.
diff --git a/apps/hassio/hassio.app.js b/apps/hassio/hassio.app.js
new file mode 100644
index 000000000..f12393773
--- /dev/null
+++ b/apps/hassio/hassio.app.js
@@ -0,0 +1,116 @@
+if (HASSIO === undefined) {
+  loadHassio();
+}
+
+function noHassio() {
+  let Layout = require('Layout');
+  let layout = new Layout( {
+    type:"v", c: [
+      {
+        type: "txt",
+        font: "10%",
+        label: "No settings",
+      },
+    ],
+    halign: -1
+  });
+  g.clear();
+  layout.render();
+}
+
+const templateGui = () => {
+  if (HASSIO === undefined) {
+    noHassio();
+    return;
+  }
+
+  let selectedTemplate = 0;
+
+  let Layout = require('Layout');
+  let layout = new Layout( {
+    type:"v", c: [
+      {
+        type: "txt",
+        font: "8%",
+        id: "name",
+        label: HASSIO.templates[selectedTemplate].name,
+      },
+      {
+        type: 'txt',
+        font:"10%",
+        id: "data",
+        label: "data",
+        wrap: true,
+        width: g.getWidth(),
+        height: g.getHeight()-80,
+        halign: -1
+      },
+      {
+        type: "txt",
+        font: "8%",
+        id: "loc",
+        label: (selectedTemplate+1) + "/" + HASSIO.templates.length,
+      }
+    ],
+    halign: -1
+  });
+
+  const fetchTemplate = (template) => {
+    const url = `${HASSIO.host}/api/template`;
+    return Bangle.http(url, {
+        method: "POST",
+        timeout: 2000,
+        body: JSON.stringify({template: template}),
+        headers: {
+            "Content-Type": "application/json",
+            Authorization: `Bearer ${HASSIO.api_key}`,
+        }
+    });
+  };
+
+  const draw = (selected) => {
+    setTimeout(() => {
+      if (selected != selectedTemplate)
+        return;
+
+      fetchTemplate(HASSIO.templates[selectedTemplate].temp).then((data) => {
+        if (selected != selectedTemplate)
+          return;
+
+        layout.data.label = data.resp;
+        layout.clear(layout.data);
+        layout.render();
+      }, (data) => {
+        if (selected != selectedTemplate)
+          return;
+
+        layout.data.label = "failed " + JSON.stringify(data);
+        layout.clear(layout.data);
+        layout.render();
+      });
+    }, 1000);
+  };
+
+  Bangle.on('touch', function(button, xy) {
+    if (xy.type === 0) {
+      selectedTemplate++;
+      if (selectedTemplate >= HASSIO.templates.length)
+        selectedTemplate = 0;
+      layout.loc.label = (selectedTemplate+1) + "/" + HASSIO.templates.length;
+      layout.name.label = HASSIO.templates[selectedTemplate].name
+    }
+
+    layout.data.label = "loading";
+    g.clear();
+    layout.render();
+    draw(selectedTemplate)
+  });
+
+
+  g.clear();
+  layout.data.label = "loading";
+  layout.render();
+  draw(selectedTemplate);
+};
+
+templateGui();
\ No newline at end of file
diff --git a/apps/hassio/hassio.boot.js b/apps/hassio/hassio.boot.js
new file mode 100644
index 000000000..14aa34f6a
--- /dev/null
+++ b/apps/hassio/hassio.boot.js
@@ -0,0 +1,128 @@
+var HASSIO;
+let hassioRunning = false;
+
+function validateHassio(settings) {
+  const STR_FIELDS = ["api_key", "host", "id", "friendly_name"];
+  const INT_FIELDS = ["interval"];
+  const TEMPLATES = "templates";
+
+  if (typeof settings !== "object") {
+    return false;
+  }
+
+  for (const field of STR_FIELDS) {
+    if (settings[field] === undefined || typeof settings[field] !== "string") {
+      return false;
+    }
+  }
+
+  for (const field of INT_FIELDS) {
+    if (settings[field] === undefined || typeof settings[field] !== "number") {
+      return false;
+    }
+  }
+  if (settings[TEMPLATES] === undefined || !(settings[TEMPLATES] instanceof Array)) {
+    return false;
+  }
+  for (const template of settings[TEMPLATES]) {
+    if (template.name === undefined || typeof template.name !== "string") {
+      return false;
+    }
+    if (template.temp === undefined || typeof template.temp !== "string") {
+      return false;
+    }
+  }
+  return true;
+}
+
+const loadHassio = () => {
+  let hassioSettings = require("Storage").read("hassio.json");
+  let tmp = HASSIO;
+  HASSIO = undefined;
+  if (hassioSettings !== undefined) {
+    try {
+      HASSIO = JSON.parse(hassioSettings);
+    } catch(e) {
+    }
+
+    if (HASSIO !== undefined && !validateHassio(HASSIO)) {
+      HASSIO = undefined;
+    }
+  }
+  if (HASSIO === undefined) {
+    HASSIO = tmp;
+  }
+};
+
+loadHassio();
+
+const runHassio = () => {
+  if (HASSIO !== undefined) {
+    let hassioAttributes = {
+      state_class: "measurement",
+      friendly_name: HASSIO.friendly_name,
+      unit_of_measurement: "%"
+    };
+
+    const postSensor = (data) => {
+        const url = `${HASSIO.host}/api/states/sensor.${HASSIO.id}`;
+        Bangle.http(url, {
+            method: "POST",
+            body: JSON.stringify(data),
+            headers: {
+                "Content-Type": "application/json",
+                Authorization: `Bearer ${HASSIO.api_key}`,
+            }
+        });
+    };
+
+    const getBattery = () => {
+      const b = E.getBattery(), 
+          c = Bangle.isCharging();
+
+      return {
+        state: c ? "charging" : "discharging",
+        level: b
+      };
+    };
+
+    Bangle.on("GPS", (fix) => {
+      hassioAttributes.gps = fix;
+    });
+
+    const updateSensor = () => {
+      hassioAttributes.health = Bangle.getHealthStatus();
+      hassioAttributes.accel = Bangle.getAccel();
+      hassioAttributes.battery = getBattery();
+      hassioAttributes.compass = Bangle.getCompass();
+
+      postSensor({
+        state: hassioAttributes.battery.level,
+        attributes: hassioAttributes
+      });
+    };
+
+    const log = () => {
+      Bangle.setCompassPower(true, "hassio");
+      Bangle.setHRMPower(true, "hassio");
+
+      setTimeout(() => {
+        updateSensor();
+        Bangle.setCompassPower(false, "hassio");
+        Bangle.setHRMPower(false, "hassio");
+      }, 30 * 1000);
+    };
+
+    log();
+  }
+};
+
+(function () {
+  if (!hassioRunning) {
+    hassioRunning = true;
+    setTimeout(() => {
+      runHassio();
+      setInterval(runHassio, HASSIO.interval);
+    }, 5000);
+  }
+})();
\ No newline at end of file
diff --git a/apps/hassio/hassio.img b/apps/hassio/hassio.img
new file mode 100644
index 000000000..49fea5b50
Binary files /dev/null and b/apps/hassio/hassio.img differ
diff --git a/apps/hassio/hassio.json b/apps/hassio/hassio.json
new file mode 100644
index 000000000..5f79da858
--- /dev/null
+++ b/apps/hassio/hassio.json
@@ -0,0 +1,13 @@
+{
+    "templates": [
+        {
+            "name":"Test Template",
+            "temp":"{% for state in states.weather -%}{%- if loop.first %}The {% elif loop.last %} and the {% else %}, the {% endif -%}{{ state.name | lower }} is {{state.state_with_unit}}{%- endfor %}."
+        }
+    ],
+    "interval": 180000,
+    "api_key":"api_key",
+    "host":"https://homeassistant:8123",
+    "id":"banglejs",
+    "friendly_name":"Banglejs Sensors"
+}
\ No newline at end of file
diff --git a/apps/hassio/hassio.png b/apps/hassio/hassio.png
new file mode 100644
index 000000000..8fce958e4
Binary files /dev/null and b/apps/hassio/hassio.png differ
diff --git a/apps/hassio/interface.html b/apps/hassio/interface.html
new file mode 100644
index 000000000..0b9f4a955
--- /dev/null
+++ b/apps/hassio/interface.html
@@ -0,0 +1,106 @@
+<html>
+  <head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+  </head>
+  <body>
+
+    <h4>Config</h4>
+    <textarea style="width: 100%;-webkit-box-sizing: border-box;-moz-box-sizing: border-box;box-sizing: border-box;height:80%;resize: none;" id="json">
+
+    </textarea>
+    <button id="reset" class="btn btn-error">Reload</button>
+    <button id="save" class="btn btn-primary">Save</button>
+
+    <script src="../../core/lib/interface.js"></script>
+
+    <script>
+      const STR_FIELDS = ["api_key", "host", "id", "friendly_name"]
+      const INT_FIELDS = ["interval"]
+      const TEMPLATES = "templates"
+      document.getElementById('reset').addEventListener('click', reset)
+      document.getElementById('save').addEventListener('click', save);
+
+      function validate(str) {
+        let settings = {};
+        try {
+          settings = JSON.parse(str)
+        } catch (e) {
+          alert("Unable to parse settings: " + String(e))
+          return false;
+        }
+        
+        if (typeof settings !== "object") {
+          alert("Settings must be an object")
+          return false;
+        }
+
+        for (const field of STR_FIELDS) {
+          if (settings[field] === undefined || typeof settings[field] !== "string") {
+            alert(`Field ${field} must be a string`)
+            return false;
+          }
+        }
+
+        for (const field of INT_FIELDS) {
+          if (settings[field] === undefined || typeof settings[field] !== "number") {
+            alert(`Field ${field} must be a number`)
+            return false;
+          }
+        }
+
+        if (settings[TEMPLATES] === undefined || !(settings[TEMPLATES] instanceof Array)) {
+          alert(`Field ${TEMPLATES} must be a list`)
+          return false;
+        }
+
+        for (const template of settings[TEMPLATES]) {
+          if (template["name"] === undefined || typeof template["name"] !== "string") {
+            alert(`Field name of a template must be a string`)
+            return false;
+          }
+          if (template["temp"] === undefined || typeof template["temp"] !== "string") {
+            alert(`Field name of a template must be a string`)
+            return false;
+          }
+        }
+
+        return true;
+      }
+
+      function getData() {
+        // show loading window
+        Util.showModal("Loading...");
+        Util.readStorageJSON('hassio.json', data=>{
+          // remove window
+          Util.hideModal();
+
+          document.getElementById('json').value = JSON.stringify(data, null, 1);
+        });
+      }
+
+      function save(){
+        Util.showModal("Saving...");
+        let data = document.getElementById('json').value;
+
+        if (!validate(data)) {
+          Util.hideModal();
+          return;
+        }
+
+        Util.writeStorage("hassio.json", data, () => {
+          Util.hideModal();
+        });
+      }
+
+      function reset(){
+        getData();
+      }
+
+      // Called when app starts
+      function onInit() {
+        getData();
+      }
+    </script>
+  </body>
+</html>
+
diff --git a/apps/hassio/metadata.json b/apps/hassio/metadata.json
new file mode 100644
index 000000000..0e9c6a2d5
--- /dev/null
+++ b/apps/hassio/metadata.json
@@ -0,0 +1,18 @@
+{ "id": "hassio",
+  "name": "Home Assistant API Interface",
+  "shortName":"Hassio",
+  "icon": "hassio.png",
+  "version":"0.01",
+  "description": "This app gives access to viewing Home Assistant data and sends health, compass, accelerometer, and battery information to Home Assistant as a sensor through the Home Assistant REST API.",
+  "tags": "tool,sensors",
+  "supports": ["BANGLEJS2"],
+  "dependencies": {"android":"app"},
+  "interface": "interface.html",
+  "readme": "README.md",
+  "storage": [
+    {"name":"hassio.app.js","url":"hassio.app.js"},
+    {"name":"hassio.boot.js","url":"hassio.boot.js"},
+    {"name":"hassio.img","url":"hassio.img"}
+  ],
+  "data": [{"name":"hassio.json"}]
+}
\ No newline at end of file