Nexus 5 (codenamed Hammerhead) is an Android smartphone manufactured by LG Electronics for Google. Co-developed with and marketed by Google Inc. as part of its Nexus line of flagship devices and unveiled on October 31, 2013, it is a successor to the Nexus 4. Nexus 5 served as the launch device for Android 4.4 "KitKat", which introduced a refreshed interface, performance improvements, increased Google Now integration, better battery life and other features. The Nexus 5 received mostly positive reviews, praising the device's balance of overall performance and cost in comparison to other "flagship" phones, along with the quality of its display and some of the changes introduced by Android 4.4. The display was, however, criticised for being too dim in comparison to other devices, and the camera was criticised for having inconsistent quality.