Our Yoga Tablet 10 HD+ came with Android 4.3. During the review, Lenovo issued an automatic update to Android 4.4, which I downloaded and installed. You’ll find Google’s large medley of Android apps on it: Chrome, Google Drive, Gmail, Google Maps, Google Play Store, YouTube, and so on. There are also apps owned by Lenovo for syncing your files to other devices or the cloud, and security software. None of these can be uninstalled, but other third-party apps already installed (which include Evernote and Skype), can be removed by the user.
Otherwise, Android 4.4 remains mostly unblemished from its original, default GUI -- it’s been augmented with some settings specific to this device to help you quickly adjust audio, display and power through the notification bar.