diff --git a/ios/RNFirebase/functions/RNFirebaseFunctions.m b/ios/RNFirebase/functions/RNFirebaseFunctions.m
index 2fe4e9d2..ef5eba76 100644
--- a/ios/RNFirebase/functions/RNFirebaseFunctions.m
+++ b/ios/RNFirebase/functions/RNFirebaseFunctions.m
@@ -1,4 +1,5 @@
 #import "RNFirebaseFunctions.h"
+#import "RNFirebaseUtil.h"
 
 #if __has_include(<FirebaseFunctions/FIRFunctions.h>)
 #import <FirebaseFunctions/FIRFunctions.h>
@@ -9,6 +10,10 @@
 RCT_EXPORT_MODULE();
 
 RCT_EXPORT_METHOD(httpsCallable:
+                  (NSString *) appName
+                  region:
+                  (NSString *) region
+                  name:
                   (NSString *) name
                   wrapper:
                   (NSDictionary *) wrapper
@@ -16,20 +21,26 @@ RCT_EXPORT_METHOD(httpsCallable:
                   (RCTPromiseResolveBlock) resolve
                   rejecter:
                   (RCTPromiseRejectBlock) reject
-                  ) {
-    FIRFunctions *functions = [FIRFunctions functions];
+                 ){
+    FIRApp *firebaseApp = [RNFirebaseUtil getApp:appName];
+    FIRFunctions *functions = [FIRFunctions functionsForApp:firebaseApp region:region];
     
-    [[functions HTTPSCallableWithName:name] callWithObject:[wrapper valueForKey:@"data"] completion:^(FIRHTTPSCallableResult * _Nullable result, NSError * _Nullable error) {
+    FIRHTTPSCallable *callable = [functions HTTPSCallableWithName:name];
+    
+    [callable
+     callWithObject:[wrapper valueForKey:@"data"]
+     completion:^(FIRHTTPSCallableResult * _Nullable result, NSError * _Nullable error) {
         if (error) {
             NSObject *details = [NSNull null];
             NSString *message = error.localizedDescription;
+            
             if (error.domain == FIRFunctionsErrorDomain) {
                 details = error.userInfo[FIRFunctionsErrorDetailsKey];
                 if (details == nil) {
                     details = [NSNull null];
                 }
             }
-            
+        
             resolve(@{
                 @"__error": @true,
                 @"code": [self getErrorCodeName:error],
@@ -40,7 +51,23 @@ RCT_EXPORT_METHOD(httpsCallable:
             resolve(@{ @"data": [result data] });
         }
     }];
-    
+}
+
+RCT_EXPORT_METHOD(useFunctionsEmulator:
+                  (NSString *) appName
+                  region:
+                  (NSString *) region
+                  origin:
+                  (NSString *) origin
+                  resolver:
+                  (RCTPromiseResolveBlock) resolve
+                  rejecter:
+                  (RCTPromiseRejectBlock) reject
+                 ){
+    FIRApp *firebaseApp = [RNFirebaseUtil getApp:appName];
+    FIRFunctions *functions = [FIRFunctions functionsForApp:firebaseApp region:region];
+    [functions useFunctionsEmulatorOrigin:origin];
+    resolve([NSNull null]);
 }
 
 - (NSString *)getErrorCodeName:(NSError *)error {