diff --git a/core/pen/include/os.h b/core/pen/include/os.h
index 42cc15c9..43c3cbe9 100644
--- a/core/pen/include/os.h
+++ b/core/pen/include/os.h
@@ -42,6 +42,7 @@ namespace pen
     const Str        os_path_for_resource(const c8* filename);
     const user_info& os_get_user_info();
     Str              os_get_persistent_data_directory();
+    Str              os_get_cache_data_directory();
     void             os_create_directory(const Str& dir);
     void             os_open_url(const Str& url);
     void             os_ignore_slient();
diff --git a/core/pen/source/ios/os.mm b/core/pen/source/ios/os.mm
index e6afa246..ef1e0086 100644
--- a/core/pen/source/ios/os.mm
+++ b/core/pen/source/ios/os.mm
@@ -393,6 +393,14 @@ Str os_get_persistent_data_directory()
         }
     }
 
+    Str os_get_cache_data_directory()
+    {
+        @autoreleasepool {
+            NSString* dir = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
+            return dir.UTF8String;
+        }
+    }
+
     void os_create_directory(const Str& dir)
     {
         @autoreleasepool {