Android OS from Google is an “in demand” thing in mobile phones these days. Half of mobile buyers look out for mobile phones with Android OS. Android OS is an open source OS and many users have taken advantage of it to develop fantastic applications which can be used by the entire android community. So, let us look at a few must have applications.
1.Google Voice:
It is probably the best ever application on the android platform. Google voice provides a phone number through which a user can make calls to multiple users. In fact, it also provides user a kind of a wrapper number to your original number, so when a user makes a call, it goes out from Google voice number which hides user’s original phone number.

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2. ATK or Advanced Task Killer
When you have a phone with Android mobile, you are going to have multiple applications running on your phone. ATK or Advanced Task killer allows killing an application if a user feels that that a particular application is degrading the performance of the phone. It also has a widget to kill all the applications at the same time.
3. Dropbox
As the name suggests, it’s a cloud application to share things with different machines or mobile phones. It is also extended to Android and interacts with different apps to open different kinds of files.
4. Droid Analytics
I am not sure why Google hasn’t come up with an application for Google Analytics. So, the best application a user can get for Google Analytics kind of analysis is Droid Analytics. mAnalytics is also a good android app to look out for.