Dropbox is shutting down Mailbox, Carousel apps

Mailbox, one of the best mail apps for iOS, which was bought over by Dropbox, is being shut down.
Mailbox, the app for managing email on iOS launched in February 2013 and bought over by Dropbox in December 2013, is shutting down.
Dropbox announced that it will be closing down Mailbox, an app it bought for $100 million along with the Carousel app. Carousel was the photo, video gallery app launched by Dropbox.
When Mailbox was first launched in February 2013, it has an invite system and over 800,