Best Microsoft Office 365 Email Apps

242+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

Looking for free microsoft office 365 email apps? 20 of our 242+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Microsoft Office 365 Email Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Microsoft OutlookMicrosoft OutlookFree4.8★ (9.2M)YesYesSep 2026
2Microsoft CopilotMicrosoft CopilotFree4.7★ (1.3M)YesYesSep 2026
3Mail App for Outlook 365Mail App for Outlook 365Free3.7★ (6)YesYesAug 2026
4MailMailFree4.6★ (4.4M)NoNoSep 2026
5Microsoft 365 AdminMicrosoft 365 AdminFree4.6★ (5.8K)NoNoSep 2026
6Microsoft ExcelMicrosoft ExcelFree4.7★ (1.5M)NoYesSep 2026
7Microsoft WordMicrosoft WordFree4.7★ (3M)NoYesSep 2026
8myMail box: email client appmyMail box: email client appFree4.4★ (18K)YesNoSep 2026

Top Picks for Microsoft Office 365 Email

Microsoft Outlook#1

Microsoft Outlook by Microsoft Corporation

Secure Email, Calendar & Files
Editor's Choice
📊 Productivity
4.8😐(9.2M ratings)
FreeAdsIn-App Purchases
#14in Productivity
Microsoft Outlook screenshot 1
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Microsoft Outlook screenshot 6

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
Microsoft Copilot#2

Microsoft Copilot by Microsoft Corporation

AI-powered productivity
Strong Contender
📊 Productivity
4.7😐(1.3M ratings)
FreeAdsIn-App Purchases
#11in Productivity
Microsoft Copilot screenshot 1
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Microsoft Copilot screenshot 5
Microsoft Copilot screenshot 6

This AI-powered app helps you be more productive at work. Chat with an AI assistant to create content, manage projects, find files, and learn new concepts. It offers voice interaction and expert insights for various tasks.

What We Love

  • 🚀 Seamless integration of Office apps
  • 🔒 Secure cloud storage with OneDrive
  • 👍 Convenient all-in-one productivity solution
  • 🚀 Great for on-the-go work and collaboration

Room to Improve

  • 🐛 Inconsistent file saving and syncing
  • 🔍 Confusing file management and navigation
  • 🔍 Limited functionality compared to desktop Office
  • 🐛 Frequent crashes and performance issues
  • 💰 Subscription-only model, no standalone option

More Microsoft Office 365 Email apps to explore

FAQ about Microsoft Office 365 Email

What are the best microsoft office 365 email apps for iPhone?
Microsoft Outlook tops our microsoft office 365 email apps ranking as of September 2026, with a 4.8-star average from 9.2M App Store ratings, and it's free to download.
Yes — 20 of the top microsoft office 365 email apps we rank are free to download, including Microsoft Outlook and Microsoft Copilot.
Microsoft Outlook shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 242+ microsoft office 365 email apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This application consolidates all your email accounts and calendars into a single, convenient location. It helps you manage your inbox, schedule meetings, and access files from various cloud storage services. The app also offers AI-powered features to enhance productivity, such as summarizing long email threads and assisting with writing.
Key features include a smart inbox that sorts messages, quick swipe actions for managing emails, easy sharing of meeting availability, and the ability to find contacts and trips. You can also view and attach files from services like OneDrive and Dropbox without downloading them, and edit Office documents directly within the app.