diff --git a/ios/TextToSpeech/TextToSpeech.m b/ios/TextToSpeech/TextToSpeech.m
index 1e769cc..a0e59e4 100644
--- a/ios/TextToSpeech/TextToSpeech.m
+++ b/ios/TextToSpeech/TextToSpeech.m
@@ -82,7 +82,6 @@ + (BOOL)requiresMainQueueSetup
         [[AVAudioSession sharedInstance]
          setCategory:AVAudioSessionCategoryPlayback
          mode:AVAudioSessionModeVoicePrompt
-         // This will pause a spoken audio like podcast or audiobook and duck the volume for music
          options:AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers
          error:nil
         ];
@@ -94,11 +93,11 @@ + (BOOL)requiresMainQueueSetup
     resolve([NSNumber numberWithUnsignedLong:utterance.hash]);
 }
 
-RCT_EXPORT_METHOD(stop:(BOOL *)onWordBoundary resolve:(RCTPromiseResolveBlock)resolve reject:(__unused RCTPromiseRejectBlock)reject)
+RCT_EXPORT_METHOD(stop:(BOOL)onWordBoundary resolve:(RCTPromiseResolveBlock)resolve reject:(__unused RCTPromiseRejectBlock)reject)
 {
     AVSpeechBoundary boundary;
 
-    if(onWordBoundary != NULL && onWordBoundary) {
+    if(onWordBoundary) {
         boundary = AVSpeechBoundaryWord;
     } else {
         boundary = AVSpeechBoundaryImmediate;
@@ -109,11 +108,11 @@ + (BOOL)requiresMainQueueSetup
     resolve([NSNumber numberWithBool:stopped]);
 }
 
-RCT_EXPORT_METHOD(pause:(BOOL *)onWordBoundary resolve:(RCTPromiseResolveBlock)resolve reject:(__unused RCTPromiseRejectBlock)reject)
+RCT_EXPORT_METHOD(pause:(BOOL)onWordBoundary resolve:(RCTPromiseResolveBlock)resolve reject:(__unused RCTPromiseRejectBlock)reject)
 {
     AVSpeechBoundary boundary;
 
-    if(onWordBoundary != NULL && onWordBoundary) {
+    if(onWordBoundary) {
         boundary = AVSpeechBoundaryWord;
     } else {
         boundary = AVSpeechBoundaryImmediate;
@@ -131,8 +130,7 @@ + (BOOL)requiresMainQueueSetup
     resolve([NSNumber numberWithBool:continued]);
 }
 
-
-RCT_EXPORT_METHOD(setDucking:(BOOL *)ducking
+RCT_EXPORT_METHOD(setDucking:(BOOL)ducking
                   resolve:(RCTPromiseResolveBlock)resolve
                   reject:(__unused RCTPromiseRejectBlock)reject)
 {
@@ -148,7 +146,6 @@ + (BOOL)requiresMainQueueSetup
     resolve(@"success");
 }
 
-
 RCT_EXPORT_METHOD(setDefaultLanguage:(NSString *)language
                   resolve:(RCTPromiseResolveBlock)resolve
                   reject:(RCTPromiseRejectBlock)reject)
@@ -178,7 +175,7 @@ + (BOOL)requiresMainQueueSetup
 }
 
 RCT_EXPORT_METHOD(setDefaultRate:(float)rate
-                  skipTransform:(BOOL *)skipTransform // not used, compatibility with Android native module signature
+                  skipTransform:(BOOL)skipTransform
                   resolve:(RCTPromiseResolveBlock)resolve
                   reject:(RCTPromiseRejectBlock)reject)
 {