I like MetroMail a lot. And it has pretty frequent updates that bring useful features and improvements. So it will probably continue to get better.
One example was that it used to be very easy to wind up choosing to delete a message (there was confirmation though) by swiping to the side on a message. A few months ago an update gave an option to permit side-swipe menus or not.
It's very necessary to have multiple apps in your mobile related to your profession or hobby. But on the other hand, it is also very necessary to check whether the apps installed in your phone actually provide you with the most needed information.I am an avid traveller and although I use many apps but I found Smeen to be very interesting and helpful.To know more about it you can click on its name.