A free program for Android, by Negroni.
What is Email App – Manage Your Inbox?
It is an email application that will help you to manage all your accounts in one place. It is very easy to use, and you will not need to configure it with your providers. Just install the app, and you will be ready to start using it.
The application supports all the major email services, such as Gmail, Yahoo, Hotmail, AOL, iCloud, and many others. With the app, you can see all your inboxes in one place.
This application will also allow you to block spam and junk mail, so you will not need to worry about those messages clogging up your inbox. It will also help you to find all the messages that you have received from a certain sender.