Compare Outlook, Outlook on the web, and Mail and Calendar apps

You might wonder which Outlook app to use for your daily tasks, such as sending email, scheduling, and managing your tasks and contacts. Each app offers a consistent user experience to help you be productive, but they serve different purposes. This article helps you decide when to use Outlook, Outlook on the web, or the Mail and Calendar apps.

Outlook 2013 and 2016

Outlook on the web

Mail and Calendar

Available for purchase as part of Office 2013, Office 2016, or Office 365.

Accessible from most browsers at Office 365 portal.

Pre-installed on Windows 10.


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Outlook is our most full-featured email and calendar app, optimized for PCs and laptops.

If you're a heavy email and calendar user, and you want all the advanced features and capabilities of email, such as scheduling and task management, rich formatting, or mailbox rules, Outlook is the best choice for you.

You can use Outlook 2013 and Outlook 2016 with your Office 365 account for business or with other accounts, such as

For quick access to your email, calendar, and contacts on any computer with an Internet connection, sign in to your organization's Office 365 mailbox.

For example, if you’re on a business trip and only have access to a shared computer in a conference center, you can use Outlook on the web to securely access your emails.

Mail and Calendar apps provide basic email and calendaring features at home or work, best suited for your Windows mobile devices.

These apps are touch-friendly and mobile optimized for simplified user experience, so no need for a keyboard or mouse. You can use and customize the swipe gestures to take actions like delete, flag, move, and so on.

The Mail and Calendar apps can be set up with your Office 365 account, (including Hotmail, Live, and MSN), Gmail, iCloud, Yahoo!, and other IMAP and POP accounts.

More information

If you use an Outlook app on iOS or Android devices, see:

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