diff --git a/objective-c/HelloWorld/HelloWorld.podspec b/objective-c/helloworld/HelloWorld.podspec
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld.podspec
rename to objective-c/helloworld/HelloWorld.podspec
diff --git a/objective-c/HelloWorld/HelloWorld.xcodeproj/project.pbxproj b/objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld.xcodeproj/project.pbxproj
rename to objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj
diff --git a/objective-c/HelloWorld/HelloWorld.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/objective-c/helloworld/HelloWorld.xcodeproj/project.xcworkspace/contents.xcworkspacedata
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld.xcodeproj/project.xcworkspace/contents.xcworkspacedata
rename to objective-c/helloworld/HelloWorld.xcodeproj/project.xcworkspace/contents.xcworkspacedata
diff --git a/objective-c/HelloWorld/HelloWorld/AppDelegate.h b/objective-c/helloworld/HelloWorld/AppDelegate.h
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/AppDelegate.h
rename to objective-c/helloworld/HelloWorld/AppDelegate.h
diff --git a/objective-c/HelloWorld/HelloWorld/AppDelegate.m b/objective-c/helloworld/HelloWorld/AppDelegate.m
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/AppDelegate.m
rename to objective-c/helloworld/HelloWorld/AppDelegate.m
diff --git a/objective-c/HelloWorld/HelloWorld/Base.lproj/Main.storyboard b/objective-c/helloworld/HelloWorld/Base.lproj/Main.storyboard
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rename from objective-c/HelloWorld/HelloWorld/Base.lproj/Main.storyboard
rename to objective-c/helloworld/HelloWorld/Base.lproj/Main.storyboard
diff --git a/objective-c/HelloWorld/HelloWorld/Images.xcassets/AppIcon.appiconset/Contents.json b/objective-c/helloworld/HelloWorld/Images.xcassets/AppIcon.appiconset/Contents.json
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/Images.xcassets/AppIcon.appiconset/Contents.json
rename to objective-c/helloworld/HelloWorld/Images.xcassets/AppIcon.appiconset/Contents.json
diff --git a/objective-c/HelloWorld/HelloWorld/Info.plist b/objective-c/helloworld/HelloWorld/Info.plist
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rename from objective-c/HelloWorld/HelloWorld/Info.plist
rename to objective-c/helloworld/HelloWorld/Info.plist
diff --git a/objective-c/HelloWorld/HelloWorld/ViewController.h b/objective-c/helloworld/HelloWorld/ViewController.h
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/ViewController.h
rename to objective-c/helloworld/HelloWorld/ViewController.h
diff --git a/objective-c/HelloWorld/HelloWorld/ViewController.m b/objective-c/helloworld/HelloWorld/ViewController.m
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/ViewController.m
rename to objective-c/helloworld/HelloWorld/ViewController.m
diff --git a/objective-c/HelloWorld/HelloWorld/main.m b/objective-c/helloworld/HelloWorld/main.m
similarity index 100%
rename from objective-c/HelloWorld/HelloWorld/main.m
rename to objective-c/helloworld/HelloWorld/main.m
diff --git a/objective-c/HelloWorld/Podfile b/objective-c/helloworld/Podfile
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rename from objective-c/HelloWorld/Podfile
rename to objective-c/helloworld/Podfile
diff --git a/objective-c/HelloWorld/README.md b/objective-c/helloworld/README.md
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rename from objective-c/HelloWorld/README.md
rename to objective-c/helloworld/README.md