Since both the Gmail app and Gmail itself is made by Google, the app supports all features Gmail offers (like labeling/starring) and gets new features implemented early - usually as soon as they are announced.
Gmail offers the ability to automatically organize your mail into specific categories: Primary Social Promotions Updates Priority Each of the categories can be disabled and you can move your mail around from category to category or set your own rules which sender should be put
Mailbox brings simple to use, swipe gesture-based ways of dealing with your incoming messages: A short swipe to the right archives a message A long swipe to the right deletes a message A short swipe to the left snoozes a message (puts it off until later) A long swipe to the left ad...
There's concern of privacy, because Mailbox has access to your emails, since they're passing through their servers. After being acquired by Dropbox these concerns have been somewhat alleviated, because of Dropbox's stable track record, but not completely.
Dispatch has support for 22 third-party apps, including: 1Password, Asana, Calendar, Evernote, FaceTime, Instapaper, Maps, Readability, Reminder, Things, Twitter among many others. Dispatch will scan your e-mail for dates and times, phone numbers and e-mail addresses, real-world locations/address...
TextExpander is a text macro tool that can, among other things, autofill your adress, signature, etc. It does that with a feature called 'snippets' and Dispatch has that functionality built in so you can respond to your e-mails quicker.
CloudMagic has 'cards', that allow quick interactions with other services, like Evernote, MailChimp, Salesforce, Trello, etc. And unlike similar integration, these interactions happen within the app itself.
Microsoft Outlook comes with quick swipe features where users can quickly swipe the thread either from left (to reschedule) or right (to delete or archive). Additionally, users can also customize the swipe actions to, for example, set swipe from left to archive or swipe from right to delete.
Microsoft Outlook comes with built-in cloud storage browser allowing you to attach files directly from services such as Dropbox, Box, Google Drive or OneDrive to emails and directly open attached files without the need for the main cloud storage app.
The app stores user information and credentials on outside servers which is a violation of ActiveSync password requirement policies. These security concerns have been enough of an issue that European Parliament has banned its members from using the app out of fear that it might lead to leaking sen...