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Best Offline Email Client Apps

7+ iOS apps curated and reviewed

4.6 avg rating
6 free apps
Updated July 2026

Whether you're new to offline email client or looking for an upgrade, our curated collection of 7+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Offline Email Client Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Microsoft OutlookMicrosoft OutlookFree4.8★ (9.2M)YesYesAug 2026
2Telegram MessengerTelegram MessengerFree4.0★ (276K)NoYesAug 2026
3Microsoft TeamsMicrosoft TeamsFree4.8★ (3.4M)NoYesAug 2026
4InstagramInstagramFree4.7★ (29M)YesYesAug 2026
5WhatsApp MessengerWhatsApp MessengerFree4.7★ (18M)YesYesAug 2026
6DoInvoice: Invoice MakerDoInvoice: Invoice MakerFree—NoYesMay 2026

Top Picks for Offline Email Client

Microsoft Outlook#1

Microsoft Outlook by Microsoft Corporation

Secure Email, Calendar & Files
Editor's Choice
📊 Productivity
4.8😐(9.2M ratings)
FreeAdsIn-App Purchases
#6in 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
Telegram Messenger#2

Telegram Messenger by Telegram FZ-LLC

Fast. Secure. Powerful.
Strong Contender
🌐 Social Networking
4.0😊(276K ratings)
FreeIn-App Purchases
#3in Social Networking
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A fast, secure, and powerful instant messaging app synced across all devices. It offers unlimited media and file sharing, robust encryption, and extensive group chat capabilities. Enjoy a simple, private, and customizable communication experience.

What We Love

  • 🚀 Fast and efficient
  • 🔒 Secure and private
  • 👍 Customizable and user-friendly
  • 💡 Innovative features like channels and bots

Room to Improve

  • 🐛 Buggy and unstable at times
  • 🔋 Battery life issues
  • 🚫 Lack of video calling feature
Microsoft Teams#3

Microsoft Teams by Microsoft Corporation

Call. Chat. Collaborate
Worth Considering
💼 Business
4.8😐(3.4M ratings)
FreeIn-App Purchases
#1in Business
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This app brings people together for community activities or work projects. It offers integrated chat, events, meetings, storage, and task management. Connect, collaborate, and get things done securely in one place.

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

Room to Improve

  • 🐛 Buggy and glitchy at times
  • 🔋 Drains battery quickly on mobile devices
  • 🔍 Difficult to navigate and find features

More Offline Email Client apps to explore

4
Instagram
Instagram
Instagram
Videos, creators & friends
Free

Connect with friends and discover new content through photos, videos, and short-form entertainment. Share your daily moments and life's highlights, or dive into personalized feeds based on your interests.

Short-form video creation and discovery (Reels)Ephemeral content sharing (Stories & Notes)Private group chats (Close Friends)
📷 Photo & Video
(29M)
free with in-app purchases
5
WhatsApp Messenger
WhatsApp Messenger
WhatsApp Messenger
Simple. Reliable. Private.
Free

Connect with friends and family globally through private messaging and high-quality calls. Share moments, documents, and stay in touch across devices, even on slow connections. Your conversations are secured with end-to-end encryption.

End-to-end encrypted messagingHigh-quality voice and video callsGroup chats and calls
🌐 Social Networking
(18M)
free with in-app purchases
6
DoInvoice: Invoice Maker
DoInvoice: Invoice Maker
DoInvoice: Invoice Maker
Create & send invoices as PDF
Free
💼 Business
(0)

FAQ about Offline Email Client

What are the best offline email client apps for iPhone?
Microsoft Outlook tops our offline email client apps ranking as of July 2026, with a 4.8-star average from 9.2M App Store ratings, and it's free to download.
Yes — 6 of the top offline email client apps we rank are free to download, including Microsoft Outlook and Telegram Messenger.
Microsoft Outlook shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 7+ offline email client apps on the iOS App Store as of July 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.