diff --git a/CliClient/app/command-sync.js b/CliClient/app/command-sync.js
index 9744518c9..a58be4d73 100644
--- a/CliClient/app/command-sync.js
+++ b/CliClient/app/command-sync.js
@@ -4,6 +4,7 @@ import { _ } from 'lib/locale.js';
 import { Setting } from 'lib/models/setting.js';
 import { BaseItem } from 'lib/models/base-item.js';
 import { vorpalUtils } from './vorpal-utils.js';
+import { Synchronizer } from 'lib/synchronizer.js';
 const locker = require('proper-lockfile');
 const fs = require('fs-extra');
 
@@ -74,7 +75,7 @@ class Command extends BaseCommand {
 
 			let options = {
 				onProgress: (report) => {
-					let lines = sync.reportToLines(report);
+					let lines = Synchronizer.reportToLines(report);
 					if (lines.length) vorpalUtils.redraw(lines.join(' '));
 				},
 				onMessage: (msg) => {
diff --git a/ReactNativeClient/lib/components/side-menu-content.js b/ReactNativeClient/lib/components/side-menu-content.js
index 0cf115766..ea9465aa6 100644
--- a/ReactNativeClient/lib/components/side-menu-content.js
+++ b/ReactNativeClient/lib/components/side-menu-content.js
@@ -4,6 +4,7 @@ import { Log } from 'lib/log.js';
 import { Note } from 'lib/models/note.js';
 import { FoldersScreenUtils } from 'lib/components/screens/folders-utils.js'
 import { NotesScreenUtils } from 'lib/components/screens/notes-utils.js'
+import { Synchronizer } from 'lib/synchronizer.js';
 import { reg } from 'lib/registry.js';
 import { _ } from 'lib/locale.js';
 
@@ -65,37 +66,22 @@ class SideMenuContentComponent extends Component {
 		NotesScreenUtils.openNoteList(folder.id);
 	}
 
-	async synchronizer_progress(report) {
-		const sync = await reg.synchronizer();
-		let lines = sync.reportToLines(report);
-		this.setState({ syncReportText: lines.join("\n") });
-	}
-
-	synchronizer_complete() {
-		FoldersScreenUtils.refreshFolders();
-	}
-
-	async componentWillMount() {
-		reg.dispatcher().on('synchronizer_progress', this.synchronizer_progress.bind(this));
-		reg.dispatcher().on('synchronizer_complete', this.synchronizer_complete.bind(this));
-	}
-
-	componentWillUnmount() {
-		reg.dispatcher().off('synchronizer_progress', this.synchronizer_progress.bind(this));
-		reg.dispatcher().off('synchronizer_complete', this.synchronizer_complete.bind(this));
-	}
-
 	async synchronize_press() {
-		if (reg.oneDriveApi().auth()) {
-			const sync = await reg.synchronizer()
-			sync.start();
+		const sync = await reg.synchronizer()
+
+		if (this.props.syncStarted) {
+			sync.cancel();
 		} else {
-			this.props.dispatch({ type: 'SIDE_MENU_CLOSE' });
-			
-			this.props.dispatch({
-				type: 'Navigation/NAVIGATE',
-				routeName: 'OneDriveLogin',
-			});
+			if (reg.oneDriveApi().auth()) {		
+				sync.start();
+			} else {
+				this.props.dispatch({ type: 'SIDE_MENU_CLOSE' });
+				
+				this.props.dispatch({
+					type: 'Navigation/NAVIGATE',
+					routeName: 'OneDriveLogin',
+				});
+			}
 		}
 	}
 
@@ -116,9 +102,14 @@ class SideMenuContentComponent extends Component {
 
 		if (items.length) items.push(<View style={{ height: 50, flex: -1 }} key='divider_1'></View>); // DIVIDER
 
-		items.push(<Button title="Synchronize" onPress={() => { this.synchronize_press() }} key='synchronize' />);
+		const syncTitle = this.props.syncStarted ? 'Cancel sync' : 'Synchronize';
 
-		items.push(<Text key='sync_report'>{this.state.syncReportText}</Text>);
+		let lines = Synchronizer.reportToLines(this.props.syncReport);
+		const syncReportText = lines.join("\n");
+
+		items.push(<Button title={syncTitle} onPress={() => { this.synchronize_press() }} key='synchronize' />);
+
+		items.push(<Text key='sync_report'>{syncReportText}</Text>);
 
 		return (
 			<ScrollView scrollsToTop={false} style={styles.menu}>
@@ -132,6 +123,8 @@ const SideMenuContent = connect(
 	(state) => {
 		return {
 			folders: state.folders,
+			syncStarted: state.syncStarted,
+			syncReport: state.syncReport,
 		};
 	}
 )(SideMenuContentComponent)
diff --git a/ReactNativeClient/lib/registry.js b/ReactNativeClient/lib/registry.js
index c58d5f6b3..8c3d3a0e2 100644
--- a/ReactNativeClient/lib/registry.js
+++ b/ReactNativeClient/lib/registry.js
@@ -5,16 +5,9 @@ import { parameters } from 'lib/parameters.js';
 import { FileApi } from 'lib/file-api.js';
 import { Synchronizer } from 'lib/synchronizer.js';
 import { FileApiDriverOneDrive } from 'lib/file-api-driver-onedrive.js';
-import { EventDispatcher } from 'lib/event-dispatcher.js';
 
 const reg = {};
 
-reg.dispatcher = () => {
-	if (this.dispatcher_) return this.dispatcher_;
-	this.dispatcher_ = new EventDispatcher();
-	return this.dispatcher_;
-}
-
 reg.logger = () => {
 	if (!reg.logger_) {
 		console.warn('Calling logger before it is initialized');
@@ -77,15 +70,7 @@ reg.synchronizer = async () => {
 	let fileApi = await reg.fileApi();
 	reg.synchronizer_ = new Synchronizer(reg.db(), fileApi, Setting.value('appType'));
 	reg.synchronizer_.setLogger(reg.logger());
-
-	reg.synchronizer_.on('progress', (report) => {
-		reg.dispatcher().dispatch('synchronizer_progress', report);
-	});	
-
-	reg.synchronizer_.on('complete', () => {
-		reg.dispatcher().dispatch('synchronizer_complete');
-	});
-
+	reg.synchronizer_.dispatch = reg.dispatch;
 	return reg.synchronizer_;
 }
 
diff --git a/ReactNativeClient/lib/synchronizer.js b/ReactNativeClient/lib/synchronizer.js
index 7ec99d88e..a284a9e0d 100644
--- a/ReactNativeClient/lib/synchronizer.js
+++ b/ReactNativeClient/lib/synchronizer.js
@@ -7,7 +7,6 @@ import { sprintf } from 'sprintf-js';
 import { time } from 'lib/time-utils.js';
 import { Logger } from 'lib/logger.js'
 import { _ } from 'lib/locale.js';
-import { EventDispatcher } from 'lib/event-dispatcher.js';
 import moment from 'moment';
 
 class Synchronizer {
@@ -25,15 +24,7 @@ class Synchronizer {
 		this.onProgress_ = function(s) {};
 		this.progressReport_ = {};
 
-		this.dispatcher_ = new EventDispatcher();
-	}
-
-	on(eventName, callback) {
-		return this.dispatcher_.on(eventName, callback);
-	}
-
-	off(eventName, callback) {
-		return this.dispatcher_.off(eventName, callback);
+		this.dispatch = function(action) {};
 	}
 
 	state() {
@@ -56,7 +47,7 @@ class Synchronizer {
 		return this.logger_;
 	}
 
-	reportToLines(report) {
+	static reportToLines(report) {
 		let lines = [];
 		if (report.createLocal) lines.push(_('Created local items: %d.', report.createLocal));
 		if (report.updateLocal) lines.push(_('Updated local items: %d.', report.updateLocal));
@@ -66,7 +57,9 @@ class Synchronizer {
 		if (report.deleteRemote) lines.push(_('Deleted remote items: %d.', report.deleteRemote));
 		if (report.state) lines.push(_('State: %s.', report.state.replace(/_/g, ' ')));
 		if (report.errors && report.errors.length) lines.push(_('Last error: %s (stacktrace in log).', report.errors[report.errors.length-1].message));
+		if (report.cancelling && !report.completedTime) lines.push(_('Cancelling...'));
 		if (report.completedTime) lines.push(_('Completed: %s', time.unixMsToLocalDateTime(report.completedTime)));
+
 		return lines;
 	}
 
@@ -101,7 +94,7 @@ class Synchronizer {
 		this.progressReport_.state = this.state();
 		this.onProgress_(this.progressReport_);
 
-		this.dispatcher_.dispatch('progress', this.progressReport_);
+		this.dispatch({ type: 'SYNC_REPORT_UPDATE', report: Object.assign({}, this.progressReport_) });
 	}
 
 	async logSyncSummary(report) {
@@ -141,7 +134,7 @@ class Synchronizer {
 	cancel() {
 		if (this.cancelling_) return;
 		
-		this.logger().info('Cancelling synchronization...');
+		this.logSyncOperation('cancelling', null, null, '');
 		this.cancelling_ = true;
 	}
 
@@ -173,11 +166,13 @@ class Synchronizer {
 
 		this.state_ = 'in_progress';
 
+		this.dispatch({ type: 'SYNC_STARTED' });
+
 		this.logSyncOperation('starting', null, null, 'Starting synchronization to ' + this.api().driver().syncTargetName() + ' (' + syncTargetId + ')... [' + synchronizationId + ']');
 
 		try {
 			await this.api().mkdir(this.syncDirName_);
-			await this.api().mkdir(this.resourceDirName_);			
+			await this.api().mkdir(this.resourceDirName_);
 
 			let donePaths = [];
 			while (true) {
@@ -442,16 +437,16 @@ class Synchronizer {
 
 		this.state_ = 'idle';
 
-		this.logSyncOperation('finished', null, null, 'Synchronization finished [' + synchronizationId + ']');
-
 		this.progressReport_.completedTime = time.unixMs();
 
+		this.logSyncOperation('finished', null, null, 'Synchronization finished [' + synchronizationId + ']');
+
 		await this.logSyncSummary(this.progressReport_);
 
 		this.onProgress_ = function(s) {};
 		this.progressReport_ = {};
 
-		this.dispatcher_.dispatch('complete');
+		this.dispatch({ type: 'SYNC_COMPLETED' });
 	}
 
 }
diff --git a/ReactNativeClient/root.js b/ReactNativeClient/root.js
index 1e3a56ef5..6f8a66668 100644
--- a/ReactNativeClient/root.js
+++ b/ReactNativeClient/root.js
@@ -48,6 +48,8 @@ let defaultState = {
 		orderBy: 'updated_time',
 		orderByDir: 'DESC',
 	},
+	syncStarted: false,
+	syncReport: {},
 };
 
 const initialRoute = {
@@ -264,6 +266,24 @@ const reducer = (state = defaultState, action) => {
 				newState.showSideMenu = false
 				break;
 
+			case 'SYNC_STARTED':
+
+				newState = Object.assign({}, state);
+				newState.syncStarted = true;
+				break;
+
+			case 'SYNC_COMPLETED':
+
+				newState = Object.assign({}, state);
+				newState.syncStarted = false;
+				break;
+
+			case 'SYNC_REPORT_UPDATE':
+
+				newState = Object.assign({}, state);
+				newState.syncReport = action.report;
+				break;
+
 		}
 	} catch (error) {
 		error.message = 'In reducer: ' + error.message;
@@ -307,7 +327,7 @@ async function initialize(dispatch, backButtonHandler) {
 	dbLogger.addTarget('database', { database: logDatabase, source: 'm' }); 
 	if (Setting.value('env') == 'dev') {
 		dbLogger.addTarget('console');
-		dbLogger.setLevel(Logger.LEVEL_DEBUG); // Set to LEVEL_DEBUG for full SQL queries
+		dbLogger.setLevel(Logger.LEVEL_INFO); // Set to LEVEL_DEBUG for full SQL queries
 	} else {
 		dbLogger.setLevel(Logger.LEVEL_INFO);
 	}
@@ -316,6 +336,7 @@ async function initialize(dispatch, backButtonHandler) {
 	db.setLogger(dbLogger);
 	reg.setDb(db);
 
+	reg.dispatch = dispatch;
 	BaseModel.dispatch = dispatch;
 	NotesScreenUtils.dispatch = dispatch;
 	NotesScreenUtils.store = store;
@@ -332,7 +353,8 @@ async function initialize(dispatch, backButtonHandler) {
 		if (Setting.value('env') == 'prod') {
 			await db.open({ name: 'joplin.sqlite' })
 		} else {
-			await db.open({ name: 'joplin-55.sqlite' })
+			//await db.open({ name: 'joplin-56.sqlite' })
+			await db.open({ name: 'joplin-56.sqlite' })
 
 			// await db.exec('DELETE FROM notes');
 			// await db.exec('DELETE FROM folders');
@@ -379,6 +401,11 @@ async function initialize(dispatch, backButtonHandler) {
 
 class AppComponent extends React.Component {
 
+	constructor() {
+		super();
+		this.lastSyncStarted_ = defaultState.syncStarted;
+	}
+
 	async componentDidMount() {
 		await initialize(this.props.dispatch, this.backButtonHandler.bind(this));
 		reg.scheduleSync();
@@ -398,6 +425,13 @@ class AppComponent extends React.Component {
 		return false;
 	}
 
+	componentWillReceiveProps(newProps) {
+		if (newProps.syncStarted != this.lastSyncStarted_) {
+			if (!newProps.syncStarted) FoldersScreenUtils.refreshFolders();
+			this.lastSyncStarted_ = newProps.syncStarted;
+		}
+	}
+
 	sideMenu_change(isOpen) {
 		// Make sure showSideMenu property of state is updated
 		// when the menu is open/closed.
@@ -433,6 +467,7 @@ const mapStateToProps = (state) => {
 	return {
   		historyCanGoBack: state.historyCanGoBack,
   		showSideMenu: state.showSideMenu,
+  		syncStarted: state.syncStarted,
   	};
 };