diff --git a/package.json b/package.json
index 855b467e..d38e4abe 100644
--- a/package.json
+++ b/package.json
@@ -40,17 +40,17 @@
     "webpack-sources": "1.0.1"
   },
   "dependencies": {
-    "@fortawesome/fontawesome": "^1.1.3",
     "@fortawesome/fontawesome-free-brands": "^5.0.6",
     "@fortawesome/fontawesome-free-regular": "^5.0.6",
     "@fortawesome/fontawesome-free-solid": "^5.0.6",
+    "@fortawesome/fontawesome": "^1.1.3",
     "@fortawesome/react-fontawesome": "^0.0.17",
     "@ledgerhq/common": "2.3.0",
     "@ledgerhq/currencies": "^2.3.0",
     "@ledgerhq/hw-app-btc": "^4.0.0",
     "@ledgerhq/hw-app-eth": "^4.0.0",
-    "@ledgerhq/hw-transport": "^4.0.0",
     "@ledgerhq/hw-transport-node-hid": "^4.0.0",
+    "@ledgerhq/hw-transport": "^4.0.0",
     "axios": "^0.17.1",
     "babel-runtime": "^6.26.0",
     "bcryptjs": "^2.4.3",
@@ -58,35 +58,36 @@
     "bs58check": "^2.1.1",
     "color": "^3.0.0",
     "cross-env": "^5.1.3",
+    "debug": "^3.1.0",
     "downshift": "^1.28.0",
     "electron-store": "^1.3.0",
     "electron-updater": "^2.20.1",
     "fuse.js": "^3.2.0",
     "history": "^4.7.2",
-    "i18next": "^10.2.2",
     "i18next-node-fs-backend": "^1.0.0",
+    "i18next": "^10.2.2",
     "lodash": "^4.17.5",
     "moment": "^2.20.1",
     "object-path": "^0.11.4",
     "qrcode": "^1.2.0",
     "query-string": "^5.1.0",
-    "raven": "^2.4.1",
     "raven-js": "^3.22.3",
-    "react": "^16.2.0",
+    "raven": "^2.4.1",
     "react-dom": "^16.2.0",
     "react-i18next": "^7.3.6",
     "react-mortal": "^3.2.0",
     "react-motion": "^0.5.2",
     "react-qr-reader": "^2.0.1",
     "react-redux": "^5.0.6",
-    "react-router": "^4.2.0",
     "react-router-dom": "^4.2.2",
     "react-router-redux": "5.0.0-alpha.9",
+    "react-router": "^4.2.0",
     "react-smooth-scrollbar": "^8.0.6",
+    "react": "^16.2.0",
     "recharts": "^1.0.0-beta.10",
-    "redux": "^3.7.2",
     "redux-actions": "^2.2.1",
     "redux-thunk": "^2.2.0",
+    "redux": "^3.7.2",
     "smooth-scrollbar": "^8.2.6",
     "source-map-support": "^0.5.3",
     "styled-components": "^3.1.6",
diff --git a/scripts/start.sh b/scripts/start.sh
index 1302e516..f9016a41 100755
--- a/scripts/start.sh
+++ b/scripts/start.sh
@@ -2,4 +2,4 @@
 
 concurrently --raw \
   "cross-env NODE_ENV=development webpack --watch --config webpack/internals.config.js" \
-  "cross-env NODE_ENV=development electron-webpack dev"
+  "cross-env DEBUG=lwd* NODE_ENV=development electron-webpack dev"
diff --git a/src/components/DevToolbar.js b/src/components/DevTools.js
similarity index 91%
rename from src/components/DevToolbar.js
rename to src/components/DevTools.js
index 1e3ba583..719f1d81 100644
--- a/src/components/DevToolbar.js
+++ b/src/components/DevTools.js
@@ -116,7 +116,7 @@ type State = {
   cpuUsage: Object,
 }
 
-class DevToolbar extends PureComponent<any, State> {
+class DevTools extends PureComponent<any, State> {
   state = {
     cpuUsage: {},
   }
@@ -155,20 +155,22 @@ class DevToolbar extends PureComponent<any, State> {
     })
   }
 
+  handleStartSync = () =>
+    mainWindow.webContents.send('msg', {
+      type: 'accounts.sync.start',
+    })
+
+  handleStopSync = () =>
+    mainWindow.webContents.send('msg', {
+      type: 'accounts.sync.stop',
+    })
+
   render() {
     const { cpuUsage } = this.state
 
     return (
       <Container>
         <Box grow flow={4}>
-          <Section title="Languages" horizontal>
-            {languages.map(lang => (
-              <Item key={lang} onClick={this.handleChangeLanguage(lang)} style={{ flex: 0 }}>
-                {lang}
-              </Item>
-            ))}
-          </Section>
-          <Bar size={2} color="white" />
           <Section title="Colors">
             {chunk(colors, 5).map((c, i) => (
               <Items
@@ -215,6 +217,23 @@ class DevToolbar extends PureComponent<any, State> {
             ))}
           </Section>
           <Bar size={2} color="white" />
+          <Section title="Languages" horizontal>
+            {languages.map(lang => (
+              <Item key={lang} onClick={this.handleChangeLanguage(lang)} style={{ flex: 0 }}>
+                {lang}
+              </Item>
+            ))}
+          </Section>
+          <Bar size={2} color="white" />
+          <Section title="Sync Accounts" horizontal>
+            <Item onClick={this.handleStartSync} style={{ flex: 0 }}>
+              Start
+            </Item>
+            <Item onClick={this.handleStopSync} style={{ flex: 0 }}>
+              Stop
+            </Item>
+          </Section>
+          <Bar size={2} color="white" />
           <Section title="CPU Usage">
             {chunk(Object.keys(cpuUsage).sort(), 2).map((l, i) => (
               <Items
@@ -284,4 +303,4 @@ Section.defaultProps = {
   horizontal: false,
 }
 
-export default translate()(DevToolbar)
+export default translate()(DevTools)
diff --git a/src/components/layout/Dev.js b/src/components/layout/Dev.js
index a728ed52..c8ffdd24 100644
--- a/src/components/layout/Dev.js
+++ b/src/components/layout/Dev.js
@@ -6,7 +6,7 @@ import styled from 'styled-components'
 import Box from 'components/base/Box'
 import GrowScroll from 'components/base/GrowScroll'
 
-import DevToolbar from 'components/DevToolbar'
+import DevTools from 'components/DevTools'
 
 const Container = styled(Box).attrs({
   grow: true,
@@ -19,7 +19,7 @@ class Dev extends PureComponent<{}> {
     return (
       <Container>
         <GrowScroll>
-          <DevToolbar />
+          <DevTools />
         </GrowScroll>
       </Container>
     )
diff --git a/src/renderer/events.js b/src/renderer/events.js
index fb695bf4..04172842 100644
--- a/src/renderer/events.js
+++ b/src/renderer/events.js
@@ -4,6 +4,7 @@ import { ipcRenderer } from 'electron'
 import objectPath from 'object-path'
 import get from 'lodash/get'
 import uniqBy from 'lodash/uniqBy'
+import debug from 'debug'
 
 import type { Accounts } from 'types/common'
 
@@ -12,10 +13,17 @@ import { CHECK_UPDATE_TIMEOUT, SYNC_ACCOUNT_TIMEOUT } from 'constants'
 import { updateDevices, addDevice, removeDevice } from 'actions/devices'
 import { updateAccount } from 'actions/accounts'
 import { setUpdateStatus } from 'reducers/update'
-import { getAccountData, getAccounts } from 'reducers/accounts'
+import { getAccountData, getAccounts, getAccountById } from 'reducers/accounts'
+import { isLocked } from 'reducers/application'
 
 import i18n from 'renderer/i18n'
 
+const d = {
+  device: debug('lwd:device'),
+  sync: debug('lwd:sync'),
+  update: debug('lwd:update'),
+}
+
 const { DISABLED_SYNC, DISABLED_AUTO_SYNC } = process.env
 
 type MsgPayload = {
@@ -41,6 +49,7 @@ export function sendSyncEvent(channel: string, msgType: string, data: any): any
 }
 
 export function startSyncAccounts(accounts: Accounts) {
+  d.sync('Sync accounts - start')
   syncAccounts = true
   sendEvent('accounts', 'sync.all', {
     accounts: accounts.map(account => {
@@ -56,11 +65,13 @@ export function startSyncAccounts(accounts: Accounts) {
 }
 
 export function stopSyncAccounts() {
+  d.sync('Sync accounts - stop')
   syncAccounts = false
   clearTimeout(syncTimeout)
 }
 
 export function checkUpdates() {
+  d.update('Update - check')
   setTimeout(() => sendEvent('msg', 'updater.init'), CHECK_UPDATE_TIMEOUT)
 }
 
@@ -74,7 +85,9 @@ export default ({ store, locked }: { store: Object, locked: boolean }) => {
       sync: {
         success: account => {
           if (syncAccounts) {
-            const currentAccountData = getAccountData(store.getState(), account.id) || {}
+            const state = store.getState()
+            const currentAccount = getAccountById(state, account.id) || {}
+            const currentAccountData = getAccountData(state, account.id) || {}
             const currentAccountTransactions = get(currentAccountData, 'transactions', [])
 
             const transactions = uniqBy(
@@ -83,6 +96,7 @@ export default ({ store, locked }: { store: Object, locked: boolean }) => {
             )
 
             if (currentAccountTransactions.length !== transactions.length) {
+              d.sync(`Update account - ${currentAccount.name}`)
               store.dispatch(
                 updateAccount({
                   ...account,
@@ -99,8 +113,21 @@ export default ({ store, locked }: { store: Object, locked: boolean }) => {
     },
     accounts: {
       sync: {
+        start: () => {
+          if (!syncAccounts) {
+            const state = store.getState()
+            const accounts = getAccounts(state)
+            const locked = isLocked(state)
+
+            if (!locked && !DISABLED_SYNC) {
+              startSyncAccounts(accounts)
+            }
+          }
+        },
+        stop: stopSyncAccounts,
         success: () => {
           if (syncAccounts && !DISABLED_AUTO_SYNC) {
+            d.sync('Sync accounts - success')
             syncTimeout = setTimeout(() => {
               const accounts = getAccounts(store.getState())
               startSyncAccounts(accounts)
@@ -115,8 +142,14 @@ export default ({ store, locked }: { store: Object, locked: boolean }) => {
       },
     },
     device: {
-      add: device => store.dispatch(addDevice(device)),
-      remove: device => store.dispatch(removeDevice(device)),
+      add: device => {
+        d.device('Device - add')
+        store.dispatch(addDevice(device))
+      },
+      remove: device => {
+        d.device('Device - remove')
+        store.dispatch(removeDevice(device))
+      },
     },
     updater: {
       checking: () => store.dispatch(setUpdateStatus('checking')),