diff --git a/SpeechSynthesizer.ios.js b/SpeechSynthesizer.ios.js
index e148dda..c545d5d 100644
--- a/SpeechSynthesizer.ios.js
+++ b/SpeechSynthesizer.ios.js
@@ -62,6 +62,21 @@ var SpeechSynthesizer = {
       });
     });
   },
+  
+  isStopped() {
+		return new Promise(function(resolve, reject) {
+			NativeSpeechSynthesizer.isStopped(function(error, finished) {
+				if (error) {
+					return reject(error);
+				}
+				if (finished === 1) {
+					resolve(true);
+				} else {
+					resolve(false);
+				}
+			});
+		});
+	},
 
   supportedVoices() {
     return new Promise(function(resolve, reject) {
diff --git a/SpeechSynthesizer.m b/SpeechSynthesizer.m
index f7de53c..1453cc4 100644
--- a/SpeechSynthesizer.m
+++ b/SpeechSynthesizer.m
@@ -2,6 +2,10 @@
 #import "RCTUtils.h"
 #import "RCTLog.h"
 
+@interface SpeechSynthesizer()
+@property (copy, nonatomic) RCTResponseSenderBlock stopCallback;
+@end
+
 @implementation SpeechSynthesizer
 
 RCT_EXPORT_MODULE()
@@ -9,104 +13,110 @@ @implementation SpeechSynthesizer
 // Speak
 RCT_EXPORT_METHOD(speakUtterance:(NSDictionary *)args callback:(RCTResponseSenderBlock)callback)
 {
-    // Error if self.synthesizer was already initialized
-    if (self.synthesizer) {
-        return callback(@[RCTMakeError(@"There is a speech in progress.  Use the `paused` method to know if it's paused.", nil, nil)]);
-    }
+	// Error if self.synthesizer was already initialized
+	if (self.synthesizer) {
+		return callback(@[RCTMakeError(@"There is a speech in progress.  Use the `paused` method to know if it's paused.", nil, nil)]);
+	}
 
-    // Set args to variables
-    NSString *text = args[@"text"];
-    NSString *voice = args[@"voice"];
-    NSNumber *rate = args[@"rate"];
+	// Set args to variables
+	NSString *text = args[@"text"];
+	NSString *voice = args[@"voice"];
+	NSNumber *rate = args[@"rate"];
 
-    // Error if no text is passed
-    if (!text) {
-        RCTLogError(@"[Speech] You must specify a text to speak.");
-        return;
-    }
+	// Error if no text is passed
+	if (!text) {
+		RCTLogError(@"[Speech] You must specify a text to speak.");
+		return;
+	}
 
-    // Set default voice
-    NSString *voiceLanguage;
+	// Set default voice
+	NSString *voiceLanguage;
 
-    // Set voice if provided
-    if (voice) {
-        voiceLanguage = voice;
+	// Set voice if provided
+	if (voice) {
+		voiceLanguage = voice;
 
-    // Fallback to en-US
-    } else {
-        voiceLanguage = @"en-US";
-    }
+	// Fallback to en-US
+	} else {
+		voiceLanguage = @"en-US";
+	}
 
-    // Setup utterance and voice
-    AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:text];
+	// Setup utterance and voice
+	AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:text];
 
-    utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:voiceLanguage];
+	utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:voiceLanguage];
 
-    if (rate) {
-      utterance.rate = [rate doubleValue];
-    }
+	if (rate) {
+	  utterance.rate = [rate doubleValue];
+	}
 
-    self.synthesizer = [[AVSpeechSynthesizer alloc] init];
-    self.synthesizer.delegate = self;
+	self.synthesizer = [[AVSpeechSynthesizer alloc] init];
+	self.synthesizer.delegate = self;
 
-    // Speak
-    [self.synthesizer speakUtterance:utterance];
+	// Speak
+	[self.synthesizer speakUtterance:utterance];
 
-    // Return that the speach has started
-    callback(@[[NSNull null], @true]);
+	// Return that the speach has started
+	callback(@[[NSNull null], @true]);
 }
 
 // Stops synthesizer
 RCT_EXPORT_METHOD(stopSpeakingAtBoundary)
 {
-    if (self.synthesizer) {
-        [self.synthesizer stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
-    }
+	if (self.synthesizer) {
+		[self.synthesizer stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
+	}
 }
 
 // Pauses synthesizer
 RCT_EXPORT_METHOD(pauseSpeakingAtBoundary)
 {
-    if (self.synthesizer) {
-        [self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
-    }
+	if (self.synthesizer) {
+		[self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
+	}
 }
 
 // Resumes synthesizer
 RCT_EXPORT_METHOD(continueSpeakingAtBoundary)
 {
-    if (self.synthesizer) {
-        [self.synthesizer continueSpeaking];
-    }
+	if (self.synthesizer) {
+		[self.synthesizer continueSpeaking];
+	}
 }
 
 // Returns false if synthesizer is paued
 RCT_EXPORT_METHOD(paused:(RCTResponseSenderBlock)callback)
 {
-    if (self.synthesizer.paused) {
-        callback(@[@true]);
-    } else {
-        callback(@[@false]);
-    }
+	if (self.synthesizer.paused) {
+		callback(@[@true]);
+	} else {
+		callback(@[@false]);
+	}
 }
 
 // Returns true if synthesizer is speaking
 RCT_EXPORT_METHOD(speaking:(RCTResponseSenderBlock)callback)
 {
-    if (self.synthesizer.speaking) {
-        callback(@[@true]);
-    } else {
-        callback(@[@false]);
-    }
+	if (self.synthesizer.speaking) {
+		callback(@[@true]);
+	} else {
+		callback(@[@false]);
+	}
 }
 
 // Returns available voices
 RCT_EXPORT_METHOD(speechVoices:(RCTResponseSenderBlock)callback)
 {
-    NSArray *speechVoices = [AVSpeechSynthesisVoice speechVoices];
-    NSArray *locales = [speechVoices valueForKey:@"language"];
+	NSArray *speechVoices = [AVSpeechSynthesisVoice speechVoices];
+	NSArray *locales = [speechVoices valueForKey:@"language"];
+
+	callback(@[[NSNull null], locales]);
+}
 
-    callback(@[[NSNull null], locales]);
+// Returns true when sound is stopped
+RCT_EXPORT_METHOD(isStopped:(RCTResponseSenderBlock)callback)
+{
+	self.stopCallback = callback;
 }
 
 // Delegate
@@ -114,38 +124,48 @@ @implementation SpeechSynthesizer
 // Finished Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Speech finished");
-    self.synthesizer = nil;
+	NSLog(@"Speech finished");
+	self.synthesizer = nil;
+	if (self.stopCallback) {
+		self.stopCallback(@[@false]);
+	}
+	self.stopCallback = nil;
 }
 
 // Started Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Speech started");
+	NSLog(@"Speech started");
 }
 
 // Paused Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Speech paused");
+	NSLog(@"Speech paused");
 }
 
 // Resumed Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Speech resumed");
+	NSLog(@"Speech resumed");
 }
 
 // Word Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Started word");
+	NSLog(@"Started word");
 }
 
 // Cancelled Handler
 -(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance
 {
-    NSLog(@"Speech cancelled");
+	NSLog(@"Speech cancelled");
+	self.synthesizer = nil;
+	if (self.stopCallback) {
+		self.stopCallback(@[@false]);
+	}
+	self.stopCallback = nil;
+
 }
 
 @end