Finally, Google has released the latest version of Android, version 4.4 named as Android KitKat with loads of new features and improvements based on Android user's experience and performance. It is designed to assist backward and older smartphones and tablets. By requiring less memory, Android KitKat can run on devices that have as little as 512MB of RAM.
The KitKat update brings some advanced visual enhancements like restyled status and stylish navigation bars, a new full-screen mode, color emoji , fascinating graphics, new intelligent integration with the support of improved closed captioning and stronger security.
If you are planning to update your smartphone to the latest version of Android 4.4 KitKat. Then, it would be fine to take a look at it's features and improvements that Google has introduced to the new update. Here is a list of best features of Android 4.4 KitKat:
1.) “OK Google”
If you're a lazy person or don't want to type anything on the keyboard then it will be the best feature for you. Now, You don't even have to touch your phone to send texts, perform searches, get directions or play music. When you are at the home screen or have Google Now pulled up, you just have to say “Ok Google” followed by a instruction or command to perform specific tasks. For Example, You can say commands like “Ok Google, where is the closest McDonalds” or “Ok Google play Justin Bieber.”
2.) Full-Screen Album And Movie Art Combined With Controls
While playing music or watching movies on your KitKat device, you will see a full-screen album and movie art appear. It lets you play, pause or stop directly from the controls on the lock screen. It is much cleaner than previous versions.
3.) Immersive Display
Unlike JellyBean or any other previous versions of Android, where status bar and navigation buttons remained on the screen. KitKat comes with a new feature that will hide everything while reading an e-book or watching a movie. If you want to do something with the status bar or navigation buttons, simply swipe the edge.

4.) Support for Integrated Pedometer
Android KitKat has also fulfilled the requirement of fitness conscious peoples. KitKat has a step detector which can be used by any person while walking, running or climbing stairs and can track how much distance they travelled and how many steps they cleared.

5.) Unlimited Home Screen Panels
Android KitKat provides the facility to add unlimited application shortcuts, folders, widgets on the home screen and on the panels. This feature can be useful for those who want less efforts to do while operating their smartphones.
6.) Enhanced Caller ID
Many peoples have the habit of ignoring calls from unknown or unrecognizable numbers. This problem can be solved by Android KitKat as it attempts to retrieve the Caller information from local listings within Google Maps.
7.) Message Consolidation
KitKat has consolidated SMS, MMS, video calls and Google hangouts gossips all at one place. The Messaging system of Android 4.4 also supports location sharing and GIFs through Google Hangouts.

8.) Emojis
Emoji is the japanese term for animated smileys and ideographs that we see in websites and messages. Google has added Emojis to the keyboard of Android 4.4 KitKat. Now, we can enhance content of the message by inserting smileys, cars, animals and many more interesting icons.
9.) Screen Recording
Android KitKat offers the support for Screen Recording, it helps to capture the screen of the phone and saves the resulting video in MP4 format inside the phone. Developers and Reviewers can take help of this feature for making videos of walkthroughs and tutorials.
10.) Quickoffice
Quickoffice lets you create and design office documents, spreadsheets, presentations that have been created with Microsoft Office or Google Docs, on your Android phone itself. Quickoffice is owned by Google and now it is preinstalled in Android KitKat.
These are the top features of Android 4.4 KitKat. There are plenty of functions and features in this OS. At Last, I will say it is better to update your device to the KitKat version to enjoy all these features.