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Inbox Cube is a promising new mail client for iOS

Apple provides a pretty efficient mail app for iOS, but third parties are always trying to be better and some users are always looking for more. Inbox Cube is a free iPhone app (it's not universal, but will work on the iPad) that makes some improvements on the basic Apple Mail app.

Inbox Cube supports iCloud mail, AOL, Yahoo and Gmail. One feature I think is very strong: the ability to just see photo, video or document attachments in a single click. That includes attachments you have sent as well as received.

The on-screen display is attractive, and it is easy to navigate. You get notifications of new email just as fast as you would with the Apple mail client. I had them both activated and heard the mail alerts at the same time from both.

Search for content in mail is very fast. In addition to global search, you can also search by subject, text in the body of the email or the from / to fields. When emails are listed, each has a colored icon with the first letter of the senders name, which makes for a quick visual way to sort. Each letter is a different color. You can swipe through mail and attachments. You can also assign favorites for mail you want to get to easily.

I don't see any support for POP or explicit support for Outlook. So, if you are outside what is supported, beware. It should be easy to set up with most IMAP-compatible systems. Outlook does support IMAP clients, but I was unable to test it. You can have multiple accounts, for example, on Gmail or the other supported mail protocols, and view them separately.

In my testing, the app was solid, although I've seen some reports of crashes. Moving to a new email app is always unsettling. Nothing is ever where you expect it to be, and only by staying with the app for a while did I get comfortable. Inbox Cube is simple enough to not be intimidating. It has some good ideas that Apple should emulate, and if the features appeal to you, it is certainly worth the free download. Your mail will still come in on the Apple client, so you're not going to lose anything. I think the only question about any new email client would be about support. It's hard to get used to something and have it go away. Hopefully, Inbox Cube is here for a long ride.

Inbox Cube requires iOS 6.1 or later. It's optimized for the iPhone 5. If you're looking for something with some fresh ideas, try it and see what you think. You can find some videos showing Inbox Cube in action at this link.