diff --git a/src/main.js b/src/main.js
new file mode 100755
index 0000000..316a957
--- /dev/null
+++ b/src/main.js
@@ -0,0 +1,153 @@
+const {
+  app,
+  BrowserWindow,
+  ipcMain,
+  Tray,
+  nativeImage,
+  Notification,
+  electron
+} = require('electron')
+const settings = require('electron-settings')
+const path = require('path')
+const AutoLaunch = require('auto-launch')
+const batteryLevel = require('battery-level')
+
+const al = new AutoLaunch({
+  name: 'Volta'
+})
+const defaultValues = {
+  min: 50,
+  max: 85
+}
+const maxNotifications = 3
+
+let tray = undefined
+let window = undefined
+
+let lastBattery = undefined
+let charging = undefined
+let numMin = 0
+let numMax = 0
+
+app.dock.hide()
+
+app.on('ready', () => {
+  createTray()
+  createWindow()
+})
+
+app.on('window-all-closed', () => {
+  app.quit()
+})
+
+const createTray = () => {
+  const icon = nativeImage.createFromPath(path.join(__dirname, 'battery.png')).resize({
+    width: 24,
+    height: 24
+  })
+  tray = new Tray(icon)
+  tray.on('right-click', toggleWindow)
+  tray.on('double-click', toggleWindow)
+  tray.on('click', toggleWindow)
+}
+
+const getWindowPosition = () => {
+  const windowBounds = window.getBounds()
+  const trayBounds = tray.getBounds()
+
+  const x = Math.round(trayBounds.x + (trayBounds.width / 2) - (windowBounds.width / 2))
+  const y = Math.round(trayBounds.y + trayBounds.height + 4)
+
+  return {
+    x,
+    y
+  }
+}
+
+const createWindow = () => {
+  window = new BrowserWindow({
+    width: 300,
+    height: 400,
+    show: false,
+    frame: false,
+    fullscreenable: false,
+    resizable: false,
+    transparent: true
+  })
+  window.loadURL(`file://${path.join(__dirname, 'index.html')}`)
+
+  window.on('blur', () => {
+    if (!window.webContents.isDevToolsOpened()) window.hide()
+  })
+
+  window.webContents.on('did-finish-load', sendCurrentValues)
+
+  // window.openDevTools({
+  //   mode: 'detach'
+  // })
+}
+
+const toggleWindow = () => {
+  if (window.isVisible()) {
+    window.hide()
+  } else {
+    showWindow()
+  }
+}
+
+const showWindow = () => {
+  const position = getWindowPosition()
+  window.setPosition(position.x, position.y, false)
+  window.show()
+  window.focus()
+}
+
+const sendCurrentValues = () => {
+  window.webContents.send('values', settings.get('values', defaultValues))
+  window.webContents.send('launch', settings.get('launch', false))
+}
+
+ipcMain.on('quit', () => {
+  app.quit()
+})
+ipcMain.on('values', (event, arg) => settings.set('values', arg))
+ipcMain.on('launch', (event, arg) => {
+  settings.set('launch', arg)
+  if (arg) al.enable()
+  else al.disable()
+})
+
+function sendMin() {
+  if (++numMin > maxNotifications || charging) return
+  new Notification({
+    name: 'Volta',
+    body: `🔌 Plug in`
+  }).show()
+}
+
+function sendMax() {
+  if (++numMax > maxNotifications || !charging) return
+  new Notification({
+    name: 'Volta',
+    body: `🔋 Unplug`,
+  }).show()
+}
+
+setInterval(() => {
+  batteryLevel().then(level => {
+    level = parseInt(level * 100)
+
+    if (level === lastBattery) return
+    if (level > lastBattery) charging = true
+    else charging = false
+    lastBattery = level
+
+    const limits = settings.get('values', defaultValues)
+
+    if (level <= limits.min) sendMin()
+    else if (level >= limits.max) sendMax()
+    else numMax = numMin = 0
+
+    window.webContents.send('battery', level)
+  }).catch(() => console.log('Could not get Battery level'))
+}, 3000)
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