Contacts is a very useful free app for Android smartphones with Android OS which searches the web to provide an impressive amount of detail about contacts stored in the user's Contacts folder. It's this extensive amount of data that the application offers that's so impressive: information on the person's recent messages written to friends or by emails, complete details on birthdays, upcoming events, weather forecasts and the list goes on. Contacts has been downloaded by millions of users all over the world and provides a very quick means of reviewing and viewing this information. The best thing about Contacts is that it is designed to work seamlessly with the latest versions of Android and also has an "app drawer" within the main interface which allows you to tap into different apps and use them from there. As well as Contacts, Google has two other apps which are basically demonstration versions of their bigger suite of programs like Chrome and Android.
The Contacts app can be installed via any Android device, as long as it's signed up to the Google Play Store. To get started, simply go into your Google Play application and sign in with a unique Google account. You'll then be taken to your home screen, where you'll see three small dots onto a full white background (that changes to red if you have animations or other visualisations installed). Tap into any one of these dots and you'll be taken straight to your Google Contacts page. You can see a table of your email address book along with all your recent emails, phone contacts and even your Google+ contacts which you can easily change from below.
The Contacts app basically acts as a skeleton for all of your other apps such as the Android Wearable app, Android Desk manager and Contacts manager. This allows you to manage your contacts directly from the main Android interface, instead of having to fiddle around with an external interface. If you use the Phone book interface for Contacts, you'll also find this makes it much easier to access all your contacts from just one place.