**** Google playstore is a biggest search engine where you can find millions of apps in which many of them are free and many of them are paid you will get millions of apps. The advanced version of the play store is in the market you can update it play store 5.0 ( 5.0.31, to be exact ) the last version was v4.9.13. .
**** As you can see form the below icons google playstore has revised its last version but there is slightly different. Kirill Grouchnikov who is the user interface engineer at the google he has posted the history of the play store from its staring days *******
More Material Design
**** When ever any new apps will register on the google it will highlighted in green so, there is no need for the scroll down you can see the new apps on after the 4 lines on the main app screen****
any other APK.
**** It has some amazing features but you have to wait. You can upgrade your apps and its cyptographic signature confirm that that which you file install will not tempered with any way but you have to wait of its official launch **********