Best Catmail Apps

247+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated August 2026

Microsoft Outlook is the household name in catmail, but it's far from the only option. We track 247+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Catmail Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Microsoft OutlookMicrosoft OutlookFree4.8★ (9.2M)YesYesAug 2026
2MailMailFree4.7★ (4M)NoNoAug 2026
3Gmail - Email by GoogleGmail - Email by GoogleFree4.7★ (2.4M)YesYesAug 2026
4CalendarCalendarFree4.9★ (1.5M)NoNoAug 2026
5myMail box: email client appmyMail box: email client appFree4.4★ (18K)YesNoAug 2026
6Mail App for HotmailMail App for HotmailFree3.8★ (143)NoYesAug 2026
7Encrypted Email - MailfenceEncrypted Email - MailfenceFree3.8★ (76)NoNoAug 2026
8SafariSafariFree4.4★ (147K)NoNoAug 2026

Top Picks for Catmail

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
Microsoft Outlook screenshot 1
Microsoft Outlook screenshot 2
Microsoft Outlook screenshot 3
Microsoft Outlook screenshot 4
Microsoft Outlook screenshot 5
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
Mail#2

Mail by Apple

Strong Contender
📊 Productivity
4.7😐(4M ratings)
Free
Mail screenshot 1
Mail screenshot 2
Mail screenshot 3

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
Gmail - Email by Google#3

Gmail - Email by Google by Google

Secure, fast & organized email
Worth Considering
📊 Productivity
4.7😐(2.4M ratings)
FreeAdsIn-App Purchases
#5in Productivity
Gmail - Email by Google screenshot 1
Gmail - Email by Google screenshot 2
Gmail - Email by Google screenshot 3
Gmail - Email by Google screenshot 4
Gmail - Email by Google screenshot 5
Gmail - Email by Google screenshot 6

This application provides a secure and efficient email experience with advanced features like spam blocking, smart replies, and multi-account support. It integrates with other Google services for enhanced productivity and collaboration.

What We Love

  • 🚀 Efficient email management
  • 👍 Easy to use interface
  • 🔒 Secure and reliable
  • 😊 Positive user experience overall

Room to Improve

  • 🐛 Bugs and glitches
  • 💡 Lacking advanced features
  • 🔒 Security concerns

More Catmail apps to explore

4
Calendar
Calendar
Calendar
by Apple
Free

Organize your entire schedule in one place. View events from multiple accounts, manage tasks, and plan gatherings with others. Stay on top of appointments, holidays, and birthdays with customizable views and shared calendars.

Unified schedule viewEvent creation and editingTask management integration
📊 Productivity
(1.5M)
free
5
myMail box: email client app
myMail box: email client app
myMail box: email client app
E-mail for Gmail, Hotmail, AOL
Free

Consolidate and manage multiple email accounts from various providers in a single, user-friendly interface. Enjoy customizable notifications, enhanced security features, and efficient search capabilities to streamline your communication.

Unified inbox for multiple email accountsCustomizable push notificationsEmail thread view
📊 Productivity
(18K)
free with in-app purchases
6
Mail App for Hotmail
Mail App for Hotmail
Mail App for Hotmail
Supports Hotmail & Outlook
Free

Manage your Hotmail and Outlook inboxes with speed and security. This app unifies multiple Microsoft email accounts into a single, efficient inbox. Features include smart search, advanced filters, customizable signatures, and enhanced security options.

Unified inbox for multiple Microsoft accountsFast email fetching and searchingSmart search and contact detection
🔧 Utilities
(143)
free with in-app purchases
7
Encrypted Email - Mailfence
Encrypted Email - Mailfence
Encrypted Email - Mailfence
Secure & private mail suite
Free

This app provides a secure and private email service with integrated cloud storage, calendar, and contacts. It offers end-to-end encryption and password-protected emails for enhanced privacy. Ideal for individuals and businesses seeking a secure communication and collaboration platform.

OpenPGP encrypted emailsPassword-protected emailsIntegrated cloud storage (Drive)
📊 Productivity
(76)
freemium
8
Safari
Safari
Safari
World’s fastest, truly private
Free

Browse the web at high speeds with advanced privacy features and extensive customization. Access your tabs, translate pages, and sync data across your Apple devices. Enjoy a cleaner reading experience and personalized browsing.

Cross-device syncingPrivate Browsing modeIntelligent Tracking Prevention
🔧 Utilities
(147K)
free
9
Boxer - Workspace ONE
Boxer - Workspace ONE
Boxer - Workspace ONE
Omnissa Workspace ONE
Free

Manage email, calendar, and contacts efficiently with customizable tools like swipe gestures and quick replies. This app offers a modern, intuitive interface designed for professionals to boost productivity on the go. It also includes features for seamless conference call dialing and robust data security.

Unified email, calendar, and contactsCustomizable swipe gesturesQuick reply templates
💼 Business
(77K)
free
10
Email for Hotmail, Outlook
Email for Hotmail, Outlook
Email for Hotmail, Outlook
Support Outlook, Hotmail
Free

Manage your Hotmail, Outlook, Live, and MSN email accounts with a fast, secure, and intuitive app. It offers unified inbox management, push notifications, advanced search, and secure sign-in options for a seamless email experience.

Unified inbox for multiple accountsFast and secure sign-inPush notifications for new emails
🔧 Utilities
(2K)
free with in-app purchases
11
InboxPlus for Gmail
InboxPlus for Gmail
InboxPlus for Gmail
Clean Email, Unsubscribe Fast
Free
🔧 Utilities
(0)
12
iMailG
iMailG
iMailG
Safe email client for Gmail
Free

A secure email client for Gmail offering robust protection with Touch/Face ID and passcode. It features customizable message viewing, anti-phishing measures, and in-app browsing. Easily insert text snippets, signatures, and manage attachments.

Touch/Face ID and Passcode protectionAnti-phishing with undisguised URL displayIn-app browsing or external browser options
🌐 Social Networking
(16)
free with in-app purchases
13
Email App for Gmail
Email App for Gmail
Email App for Gmail
and other mail services
Free

Manage your Gmail and other email accounts with a beautifully designed, fast, and secure application. Enjoy intuitive actions, custom notifications, and advanced security features to keep your inbox organized and protected.

Custom push notificationsUser-friendly interfaceContact avatars and email threads
📊 Productivity
(4.1K)
free with in-app purchases
14
Letters - an email experience
Letters - an email experience
Letters - an email experience
by Vumonic Datalabs OU
Free
📊 Productivity
(0)
15
CosmoSia
CosmoSia
CosmoSia
Easy to use and full support!
Free

Create a personalized email address with your own domain, offering carrier-like ease of use and robust privacy features. Manage multiple email accounts, block unwanted messages, and enjoy a user-friendly interface. Ideal for those seeking a professional or custom email solution.

Create custom email addressesManage multiple email accountsBlock unwanted emails
📊 Productivity
(1)
free with in-app purchases
16
Superhuman Mail
Superhuman Mail
Superhuman Mail
The most productive email app
Free

This email application streamlines inbox management with AI-powered drafting and summarization. It helps users prioritize important messages, schedule emails for optimal delivery, and collaborate with teams through shared email views and integrated CRM tools. Save time and improve responsiveness with advanced features.

AI email draftingAutomatic email summarizationCustomizable inbox triage
📊 Productivity
(3.6K)
free with in-app purchases
17
DriveMail Voice
DriveMail Voice
DriveMail Voice
Listen & reply on CarPlay
Free
💼 Business
(0)
18
Nameh.ai
Nameh.ai
Nameh.ai
by Virentiq LLC
Free
📊 Productivity
(0)
19
Meron Mail
Meron Mail
Meron Mail
Messages that spark joy
Free
📊 Productivity
(0)
20
MailBuzzr HD
MailBuzzr HD
MailBuzzr HD
Email app for Outlook & Gmail
Free

Manage multiple email accounts from Outlook, Gmail, and Hotmail in one place. Offers smart notifications, customizable signatures, and an elegant design for an enhanced email experience. View attachments directly within the app.

Multiple account supportUnified inboxQuick message peek
📊 Productivity
(61)
free with in-app purchases

FAQ about Catmail

What are the best catmail apps for iPhone?
Microsoft Outlook tops our catmail apps ranking as of August 2026, with a 4.8-star average from 9.2M App Store ratings, and it's free to download.
Yes — 20 of the top catmail 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 August 2026.
We track 247+ catmail apps on the iOS App Store as of August 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.