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The Best Email Apps for iPhone in 2021

By Spike Team, May 19, 2021
Best email apps for ios on iphone

If you’ve worked out exactly what you need from our recent best email apps article, then you’re already on your way to streamlining your communications. However, for the iPhone and iPad fans of the world, then you probably want to know what’s the best email app for iPhone and iOS. Well, you’re in luck. We love email, so we spend a lot of time searching to answer the question of what is the best email app for iPhone?


Well, don’t worry, we’ve got your back! Especially now that iOS 14 and beyond allows a new default email app to be set, there’s never been a better time to ditch Apple’s email app and look for the best email for iPhone.


Once you find the best iOS email app, go to the Settings app on your iPhone, swipe down to find your favorite third-party email app. Tap on it, and then mark it as your default email app.



email app on iphone


Start comparing our favorite email apps on the iPhone with our at-a-glance table and find the features you’re looking for. We’ve got all the information you need to choose the best email application for iPhone. Read on! 





best email app on iphone
  • 21st-century email app for iPhone and iPad 

  • Seamless combination of email and instant messaging features 

  • Powerful collaborative notes and tasks 

  • Multiple email addresses 

  • Easy access to most popular cloud services 

  • Merge multiple calendars in a single list 


Spike turns your email into simple, chat conversations, so you can work and collaborate seamlessly with
clients and team members – in a more natural way. By eliminating repeating headers, signatures, and threads, Spike clears the clutter and transform your email into a real time chat that’s easy to read. Spike works with all major email services like Gmail, iCloud, Yahoo, Hotmail, AOL, GMX, Exchange 365, Outlook, as well as any standard IMAP account.


Spike integrates a host of useful features directly into your iOS email app, providing the ultimate, unified workspace. Priority Inbox keeps all conversations with your most important contacts front and center, and an all-knowing Calendar is easily accessible on the same screen as your inbox – so you never miss an appointment and can reference it without switching screens or apps. You can easily manage attachments with Spike’s Advanced Search.


best email app on iphone with collaboration


In addition to this, collaborative Notes and Tasks help you and your team work together seamlessly, while practical features such as File Manager allow you to preview your files directly in line with your message. You can also easily manage multiple email addresses from your inbox, as well as connect directly to your favorite cloud provider so you have all your work at your fingertips.


Spike video conferencing


Spike is also fully integrating video calls and audio channels into Spike as well. Teams and businesses need more than just typed words to collaborate. Spike is leading the way for a future where our communication and collaboration apps are both fully integrated and make our work easier and more enjoyable.


Spike uses sophisticated AES256 email encryption to keep your data safe and your email chats secure. Spike is ad-free and does not rent, sell, distribute or monetize on your data. To anyone. Ever. Spike stores only the minimum data needed to provide the fastest communication and collaboration experience. Period.


Try Spike for free on iPhone

Apple Mail

email app on iphone
  • Pre-installed email app on your iPhone, iPad, and Mac 

  • Easy to use with an intuitive interface 

  • Full support for iCloud  

  • Secure and reliable 

  • Lacks advanced email functionality 


Considered by some to be the best email application for iPhone, Apple Mail first hit the scene in 2004 and is a favorite of busy (lazy?) Mac users by default. Of course, it’s still got plenty going for it as a standalone email app, and its integration with the macOS suite of tools makes Mail a great all-rounder.


Full support for Apple’s iCloud storage brings this elder statesman into the modern era and you can easily send files of up to 5 GB. Another plus point is the simple search feature that lets users navigate multiple POP, IMAP, Exchange, and iCloud accounts all together in the same place, helping you to find specific emails even if your inbox is overflowing.

Not happy with Apple Mail? Be sure to check out our top Apple Mail alternatives



email app on iphone
  • Great iOS email app for business users 

  • Tried and tested 

  • Microsoft 365 and OneDrive integration 

  • All major email providers are supported 

  • May be too expensive for some people 


Having been around since 1997, MS Outlook is a tried and tested favorite—particularly among business users. The Outlook email app for iPhone is reliable and relatively easy to use, and it remains a popular choice for many people. Perhaps unsurprisingly, the iOS version is relatively new, as until recently, Microsoft didn’t support their major rival’s platform. Unfortunately, this also means that not all Outlook functionality is supported.


Ideal for anyone using Microsoft 365 on a regular basis, Outlook ensures near-seamless integration with the company’s wider suite of tools on the iOS platform. This includes MS Excel and Word, as well as a useful calendar. Unfortunately, it doesn’t integrate so will Apple’s iCloud, meaning you might have some cross-compatibility issues.




email app on iphone
  • Ubiquitous email app for iOS 

  • Recognizable user interface 

  • Excellent notifications and reminders 

  • Multiple email addresses supported 

  • Easy access to Google Calendar and Drive 


No iOS email app list would be complete with a nod to Google, and for many people Gmail is the epitome of free email. In fact, users of any of the iPhone email apps almost certainly have at least one Gmail address, so using the iOS email app is completely logical.


The app itself supports all the major email accounts, allowing you to consolidate all your email addresses in one place. However, when managing multiple inboxes with the app, it’s not the most intuitive experience when compared to other Apple email apps. A useful Undo Send feature, alongside comprehensive integration with the Google calendar with excellent notifications and reminders do make up for it though.   


If you aren’t in the Gmail ecosystem or want to avoid using an app that tracks you for advertising purposes, you’ll want to avoid the Gmail app. Gmail is a very secure service, but Google makes all of its money from advertising.




email app on iphone
  • Ideal iOS email app with intuitive email management 

  • Snooze and send later features 

  • Clean user interface 

  • Interesting past with uncertain future 

  • Expensive for some people 


Newton has had a rollercoaster ride over the past few years, but this Mac and iOS-user favorite is still forging ahead. An intuitive approach to email management still appeals to many people, and despite the fact that this is a paid iOS email app, it’s still gained many fans over the years and is considered the best email app for iOS by some of its fans.


The latest feature is called Tidy Inbox, and it intuitively organizes your email for easier management. However, there have been security concerns with Newton, and only HTTP is supported for message encryption. As an alternative iPhone email app, this is a great option for those who like to do things a little bit differently.  


Newton doesn’t collect any personal information for advertising purposes and maintains physical, administrative, and technological safeguards to preserve the integrity and security of all information collected through Newton.




email app on iphone
  • Ideal iOS email app with increased security 

  • Powerful email encryption 

  • Simple user interface 

  • Can be a little basic for certain users 

  • Open source 


For anyone worried about security, ProtonMail may be exactly what you’re looking for. The online world still poses a threat to email users, and even though Apple’s operating systems are historically extremely secure, ProtonMail gives you just that little bit extra protection.


End-to-end email encryption ensures all your data and documents are safe, and an easy-to-navigate user interface makes managing secure email a breeze. ProtonMail is also open source and completely free to use, the ideal iOS email app for anyone who doesn’t want to shell out their hard-earned cash but won’t compromise on security.  


If you want all the bells and whistles, though, you’ll need to look elsewhere.




email app iphone
  • Recognizable iOS email app 

  • 3D touch passwords 

  • Slick user interface 

  • iCloud sync 

  • 24/7 support for premium users 


Another exclusive iOS email app, Airmail takes its cue from Apple Mail, delivering a slick user interface that will make Apple users feel right at home. Featuring 3D Touch, fast document previewing and native integration with many apps, it’s made for advanced email users who want to be more efficient.


Workflow customizations including snooze, push notifications, and iCloud sync gives you plenty of options for workplace efficiency, while for Premium users, you can also get 24/7 support. Finally, dark mode is included to give you that sleek Apple email app look on your iPhone or iPad.




  • Requires you to change email accounts to use it 

  • Cuts down on email clutter 

  • Works cross-platform (iOS, Mac, PC, Web) 

  • $99 annual payment required to use it 


Hey is a new email service from the team at Basecamp. Hey is part app and email service combined into one. Hey offers an ‘Imbox’ that is designed to only show you the important messages, and it filters less critical messages for you to work on later. In Hey, all your attachments are organized together into an attachment library. 


Hey offers a lot of great benefits to help people manage their inboxes, but it’s going to be a non-starter for a lot of users due to its $99/annual subscription and the fact that you have to completely change your email address.


Hey is a very secure service and uses Encryption at-rest, at-work, and in-transit, but not end-to-end because it’s challenging to do that with email. Hey is also conducting external security audits.




  • One of the oldest email services still in use 

  • Works with multiple accounts includes Gmail, Microsoft Outlook, AOL, AT&T, and Yahoo mailboxes 

  • Yahoo as a company has been bought and sold many times 

  • Includes a nice today view to see weather and upcoming appointments 


Yahoo is one of the original web companies since it has been around since 1994. Over the years, it’s evolved quite a bit from what it started as, and it’s lost much of its relevance from its high point in the early 2000s. Nevertheless, it’s still a popular email service for many people. In recent years, the iPhone app has improved quite a bit and can now work with external email accounts like Gmail, Outlook, and AOL. 


Since Yahoo is a free service, it still relies heavily on advertising, though. For people who primarily use email to organize coupon alerts, manage shopping lists, and want to track their packages, it’s a pretty useful tool. If you use email for business or heavy personal use, other solutions will be better suited for those needs.


Since Yahoo is an app from a major media company, it can generally be found secure, but be reminded that Yahoo is driven by advertising so your data will be mined. 


Updated 5/19/2021 

 FAQs – iOS Email Apps

Installing an iOS email app is usually simple. Just head to the Apple App Store icon on your phone or tablet and search for your choice of app.  Alternatively, follow our links to go directly to the app you want to test out. Install the app by clicking the “install“ button and it will automatically appear on your home screen. For more information on the installation process, head over to the App Store.

Depending on your chosen iPhone or iPad email app, the instructions for adding new accounts will vary. In most cases, you’ll simply add your email address and password when prompted. However, sometimes you may also need to enter IMAP or Exchange settings which can usually be found on the website of your specific email provider.

Most iOS email apps will allow you to add multiple email accounts, however, there are some that do not. For more information on how to add multiple email accounts to your app check out the FAQ pages of your chosen app or the website.

Synchronization between smartphones, tablets, and desktops is usually automatic once you have installed your chosen Apple email app on each device. Sometimes you may have to enter a code or manually add your chosen email addresses. More information about syncing devices is usually found on the app website. 

Starting with iOS 14, Apple allows email apps to be set as the default. Go to the Settings app, scroll down to find your favorite email app, tap on it, and then set it as the default. 

Apple Mail is the default email app on iOS, but starting with iOS 14, Apple allows third-party email apps to be set as a new default. What this feature means is that clicking on an email address link launches the app of your choice.  

Spike Team The Spike team posts about productivity, time management, and the future of email, messaging and collaboration.