Sparrow is an iPhone mail client designed with love to provide you with an efficient and pleasant mailing experience.
With its pane navigation, its new threading system and many new features, you’ll never look back.

Warning: Sparrow does not support POP accounts and does not do Push notification yet

Features:

– Full IMAP support:
Use your Gmail, Google Apps, iCloud, Yahoo, AOL, Mobile Me and custom IMAP accounts.

– Unified Inbox
All your mails in a unique mailbox.

– Attachments
Directly attach photos & images when composing a mail. No more cumbersome back and forth with your photo library.

– Up & down your conversations
Swipe up or down on a message to navigate a conversation.

– Everything is a swipe away
Swipe once to uncover your mailboxes, labels and folders.
Swipe again to get to your account list.

– Faces
Mail is much nicer with your friends’ profile pictures.

– Message swipe
Star, add a label, archive or delete a conversation right away simply by swiping a message.

– Smart contacts
Your most frequent contacts on top of the list.

– Quick mailbox switch
Navigate between your inbox, unread and favorites by tapping/swiping the top bar.

– Mark all as read
One click to rule them all. You can also press a message for a few seconds to mark it as read/unread.

– Thread view
Tap the top bar in the conversation to quickly navigate all messages in a thread.

– Pull to refresh
Finally, the simplest way to refresh comes to email.

– Priority Inbox support
Automatically identify your important email and separates it out from everything else.

– Alias
Have a pro and a private mail address? Use alias to keep things separated.

– Powerful search
Local and remote search allow you to find the mail you’re looking for.

And many more features crafted with love to discover:
– Quick sender switch in compose window
– Mark all as read
– Read/unread with a long press on a message cell
– Reply all quick switch…

Coming in future versions
– Localization
– Landscape mode
– Built-in browser
– Send and Archive
– Only show specific label/folder

Cons

1. There’s no POP account support
2. There’s no push notification
3. I wish the developer can add in Cloud services like dropbox, box.net, sugarsync and etc to attach documents 😀
4. I wish there’s a select all button before setting them to “all read” or “all delete” so I can clear spam folder faster.
5. Hopefully additional spam filter that gmail have but I know it’s going to be tough to implement that
6. I’m not sure if it’s possible to display avatar from the address book
7. A little pricy for a application that duplicates a free native email client with slight improvement on user interface & features.

Overall, I’m still happy with my purchase and hopefully more features will be implemented soon! 😀