The app is designed to make email more "personal" by organizing emails into a contact-centric view. Unibox's interface is divided into two main panes, with the left side displaying contacts and the right side displaying all messages that have been received/exchanged with a particular person or website.
According to Unibox, this chat-like design significantly reduces email clutter by grouping incoming messages from contacts into a single list.
Composing emails with the app is done in a single window, which eliminates separate compose windows utilized by existing apps like Mail. All attachments sent to and received from contacts are readily available, and attached media is presented in a grid view.
Unibox supports all IMAP accounts and works with both Mountain Lion and Mavericks. The full Mac app is expected to be released at the end of September, and ahead of release, users can sign up for the beta on the company's website. Beta will last until the Mac app debuts.