diff --git a/ios/Classes/Api/MOP_sendCustomEvent.h b/ios/Classes/Api/MOP_sendCustomEvent.h
index 39436be..973b754 100644
--- a/ios/Classes/Api/MOP_sendCustomEvent.h
+++ b/ios/Classes/Api/MOP_sendCustomEvent.h
@@ -10,6 +10,7 @@
 NS_ASSUME_NONNULL_BEGIN
 
 @interface MOP_sendCustomEvent : MOPBaseApi
+@property (nonatomic, copy)NSString *appId;
 @property (nonatomic, strong) NSDictionary *eventData;
 @end
 
diff --git a/ios/Classes/Api/MOP_sendCustomEvent.m b/ios/Classes/Api/MOP_sendCustomEvent.m
index 4642b06..85b760a 100644
--- a/ios/Classes/Api/MOP_sendCustomEvent.m
+++ b/ios/Classes/Api/MOP_sendCustomEvent.m
@@ -15,14 +15,24 @@
         failure(@{@"errMsg": @"sendCustomEvent:fail"});
         return;
     }
+    if (!self.appId) {
+        [[FATClient sharedClient].nativeViewManager sendCustomEventWithDetail:self.eventData completion:^(id result, NSError *error) {
+            if (error) {
+                failure(@{@"errMsg": @"sendCustomEvent:fail"});
+            } else {
+                success(result);
+            }
+        }];
+    } else {
+        [[FATClient sharedClient].nativeViewManager sendCustomEventWithDetail:self.eventData applet:self.appId completion:^(id result, FATError *error) {
+            if (error) {
+                failure(@{@"errMsg": @"sendCustomEvent:fail"});
+            } else {
+                success(result);
+            }
+        }];
+    }
     
-    [[FATClient sharedClient].nativeViewManager sendCustomEventWithDetail:self.eventData completion:^(id result, NSError *error) {
-        if (error) {
-            failure(@{@"errMsg": @"sendCustomEvent:fail"});
-        } else {
-            success(result);
-        }
-    }];
     
 }
 @end