One of the reasons that people buy smartphones or tablets is for emails. If you are at work or at home, you receive on a daily basis tones of emails. The Gmail app for Android hasn't yet received an update which lets you post the unread messages on the top of your screen in the app. Though, this function will come to Android users, there is a way to do this now.
There are four steps. First, when in the app, you must open the search bar by tapping the magnifying glass on top left corner. Then, enter the phrase " Is unread in inbox". Then you must tap OK and launch the search. This will show you all the unread messages that you have.
To do this the second time, only open the search box and look after the phrase in the history search and tap OK.
This is not such a WOW thing to do, but surely Google should do something about this because it is annoying a lot of users.