This is an email client like Opera mail on Android. With the features like:
- Automatically mailing list management
- Sort emails into multiple views(attachment, account, mailinglist etc)
- Multiple email accounts in one app
- Does nothing in background, no push notification, no background process, it will only sync email when you tell it to, and you have full control of how to sync mails.

If you are a programmer or any professionals working with a lot of mailing list in your life. Or if you are tired of add more and more filter to you email account. Or you are a opera mail fan, it is just for you.