Microsoft Outlook Calendar review

Outlook Calendar is the obvious pick when your job already runs on Microsoft 365 or Exchange, because meeting invites, room bookings and colleagues' availability all come through it. Microsoft offers the calendar free with a personal Outlook.com account and lets you share a calendar with others while setting their viewing or editing permissions. The Outlook app for iPhone works with Microsoft Exchange, Office 365, Outlook.com, Gmail, Yahoo and iCloud accounts, so a personal Gmail or iCloud calendar can sit next to the work one on your phone. Microsoft 365 Basic costs $1.99 a month in the US and adds ad-free email, calendar and contacts plus 100 GB of cloud storage. The downsides: the free version carries ads, the calendar lives inside an email client rather than a dedicated calendar app, and Copilot features need a Microsoft 365 Personal or Family plan, which starts at $6.99 a month.

Who it is for

people whose employer runs on Microsoft 365 and Exchange

Price

Free with Outlook.com; Microsoft 365 Basic with ad-free email and calendar $1.99 per month.

Microsoft 365 Basic Online protection and cloud storage for one person $1.99 /month
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Free online calendar with a personal Outlook.com account
• Calendars can be shared with others with view or edit permissions
• The Outlook iPhone app works with Exchange, Microsoft 365, Outlook.com, Gmail, Yahoo and iCloud accounts
• Microsoft 365 Basic adds ad-free email, calendar and contacts plus 100 GB of cloud storage
• Email and calendar live in the same app

Strengths and weaknesses

• Strength: Free calendar with a Microsoft account
• Strength: Native fit for Exchange and Microsoft 365 work accounts
• Strength: Mobile app adds Gmail and iCloud accounts alongside Outlook
• Weakness: The free tier shows ads; ad-free needs Microsoft 365 Basic at $1.99 a month
• Weakness: Built around email, so the calendar is one part of a larger app
• Weakness: Microsoft 365 Personal with Copilot features starts at $6.99 a month in the US

Key facts

• Price: Free; Microsoft 365 Basic $1.99 per month
• Accounts in iPhone app: Exchange, Microsoft 365, Outlook.com, Gmail, Yahoo, iCloud
• Sharing: Shared calendars with view or edit permissions
• Microsoft 365 Basic storage: 100 GB cloud, 100 GB mailbox

Where it ranks

Microsoft Outlook Calendar is No. 5 in our Best Calendar Apps verdict.