When comparing SquareOne vs Yahoo! Mail, the Slant community recommends Yahoo! Mail for most people. In the question“What are the best e-mail clients for iOS?” Yahoo! Mail is ranked 11th while SquareOne is ranked 14th. The most important reason people chose Yahoo! Mail is:
With this Yahoo! Mail feature users can open any e-mail in a new tab and get back to the mail list without having to close the e-mail that the user is currently reading.
Specs
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Pros
Pro It's possible to get notified of only important messages
Once incoming messages are grouped into zones, it's possible to mute certain zones so that they don't show push notifications.
Pro Can automatically group incoming messages to help manage them
SquareOne allows setting up "zones" that will automatically pull incoming messages from set contacts. This allows you to focus on one group at a time. For example, a work group during work time and a friends and family group once you're home.
Pro Tabs
With this Yahoo! Mail feature users can open any e-mail in a new tab and get back to the mail list without having to close the e-mail that the user is currently reading.
Pro Background wallpaper
Similar to Mail app bundled in Windows 10, Yahoo! Mail allows users to set images from Flickr as the background image for the app.
Pro Stationary
Stationary is an add-on that's only available in Yahoo! Mail. It allows users to customize and enhance the look of the email. Things like image borders, letter style etc. can be changed before sending the email to intended recipients.