Best O365 Outlook Apps

230+ iOS apps curated and reviewed

4.2 avg rating
19 free apps
Updated October 2026

Looking for free o365 outlook apps? 19 of our 230+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top O365 Outlook Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Microsoft OutlookMicrosoft OutlookFree4.8★ (9.4M)YesYesNov 2026
2MailMailFree4.6★ (4.5M)NoNoNov 2026
3Microsoft TeamsMicrosoft TeamsFree4.8★ (3.4M)NoYesNov 2026
4Microsoft 365 AdminMicrosoft 365 AdminFree4.6★ (5.8K)NoNoOct 2026
5Mail App for Outlook 365Mail App for Outlook 365Free3.7★ (6)YesYesOct 2026
6Microsoft CopilotMicrosoft CopilotFree4.7★ (1.4M)YesYesNov 2026
7Mail+ for OutlookMail+ for Outlook$4.993.9★ (840)NoYesOct 2026
8Boxer - Workspace ONEBoxer - Workspace ONEFree4.4★ (77K)NoNoNov 2026

Top Picks for O365 Outlook

Microsoft Outlook#1

Microsoft Outlook by Microsoft Corporation

Secure Email, Calendar & Files
Editor's Choice
📊 Productivity
4.8😐(9.4M ratings)
FreeAdsIn-App Purchases
#17in Productivity
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Consolidate all your email accounts and calendars into one streamlined application. Manage your inbox, schedule meetings, and access files from various cloud services. Enhance productivity with AI-powered writing assistance and smart inbox features.

What We Love

  • 🚀 Great for corporate email
  • 👍 Customizable and user-friendly
  • 🚀 Seamless integration with Microsoft 365
  • 👍 Solid email and calendar functionality

Room to Improve

  • 🐛 Buggy and unstable at times
  • 🔋 High battery consumption
  • 🔒 Security issues with password resets
  • 👎 Limited file attachment options
Mail#2

Mail by Apple

Strong Contender
📊 Productivity
4.6😐(4.5M ratings)
Free
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Consolidate all your email accounts into a single, organized inbox. Prioritize important messages, quickly respond with smart replies, and manage your inbox efficiently with features like scheduling and snoozing. Enjoy enhanced privacy with IP address hiding and read receipt prevention.

What We Love

  • 🚀 Efficient email management
  • 🔒 Secure and private
  • 👍 Simple and intuitive interface
  • 💡 Useful categorization of emails

Room to Improve

  • 🐛 Inconsistent swipe gestures
  • 🐛 Unreliable search function
  • 🐛 Emails disappearing or not syncing properly
  • 🐛 Slow email download and loading times
  • 🐛 Buggy performance after updates
Microsoft Teams#3

Microsoft Teams by Microsoft Corporation

Call. Chat. Collaborate
Worth Considering
💼 Business
4.8😐(3.4M ratings)
FreeIn-App Purchases
#3in Business
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This app brings people together for collaboration, communication, and task management. It offers secure audio and video calls, document collaboration, and cloud storage for files and photos. Organize communities, manage projects, and stay connected with integrated chat and calendar features.

What We Love

  • 🚀 Excellent for video calls and screen sharing
  • 👍 Seamless integration with Office 365
  • 🚀 Smooth switching between devices
  • 👍 Helpful for remote work and collaboration
  • 👍 Good file sharing and organization features

Room to Improve

  • 🐛 Buggy and glitchy at times
  • 🔋 Drains battery quickly on mobile devices
  • 🔍 Difficult to navigate and find features
  • 👎 Lack of customization options
  • 🔒 Concerns over privacy and data usage

More O365 Outlook apps to explore

FAQ about O365 Outlook

What are the best o365 outlook apps for iPhone?
Microsoft Outlook tops our o365 outlook apps ranking as of October 2026, with a 4.8-star average from 9.4M App Store ratings, and it's free to download.
Yes — 19 of the top o365 outlook apps we rank are free to download, including Microsoft Outlook and Mail.
Microsoft Outlook shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 230+ o365 outlook apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.