“ProtonMail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.” Wall Street Journal

ProtonMail is the world’s largest encrypted email service with over 1 million users. The ProtonMail secure email app for iPhone and iPad brings easy-to-use email encryption to your mobile device by seamlessly integrating PGP end-to-end encryption. ProtonMail also provides a modern user interface with a full set of innovative features such as customizable swipe gestures and the ability to send expiring emails.

Since we were founded by CERN scientists in 2013, we have been joined by citizens from around the globe who have supported our mission to protect online privacy. Our mobile app was made possible by a record-breaking $550,000 donation campaign. With the ProtonMail app, you can now create your own free ProtonMail email account and start experiencing the secure email of the future.

Why use ProtonMail?

• Ensure your emails stay private and cannot be intercepted or disclosed to third parties
• End-to-end encryption, OpenPGP compatible
• Easy-to-use: encryption is done automatically and is completely invisible to the user
• Zero-access: all messages are stored in encrypted format—not even ProtonMail can read your messages
• Open source: ProtonMail's encryption is open to inspection by security experts from around the world
• Free: ProtonMail is 100% free, no catches.
• Swiss privacy and neutrality: ProtonMail is hosted entirely in Switzerland, under the protection of the world's strongest privacy laws

With the ProtonMail app, you can:

• Create a new email address with automatic PGP key creation and management
• Send and receive encrypted emails and attachments automatically
• Set timers for messages to self-destruct after sending
• Quickly organize emails with customizable swipe gestures and labels
• Get push notification of new emails
• Send password protected encrypted emails to non-ProtonMail email addresses

ProtonMail in the press:

“ProtonMail is a gmail-like email system which uses end-to-end encryption, making it impossible for outside parties to monitor.” Forbes

“A new email service being developed by a group from MIT and CERN promises to bring secure, encrypted email to the masses and keep sensitive information away from prying eyes.” Huffington Post

What's New

Version 1.10.0


Add in-app purchase.

Fixed the encrypted messages from Facebook that were not displayed properly in some languages
Fixed the email encoding issues
Fixed the user unable to see the attachments in messages received from non ProtonMail addresses
Fixed embedded image display issues
Fixed mobile signature display issues
Fixed lock icons not showing correctly for EO messages
Fixed the blank space not being recognized in the password for EO messages
Fixed TouchID/Pin issue in share feature
Fixed inability to share contacts from the Contacts app
Fixed encoding issue when forward HTML newsletter
Fixed the issue "Message sending failed please try again MIME body is not 7-bit clean"

Improved the network error handling
Improved the new email notification bar layout
Improved the stability of the share feature
Improved the badge number behavior

Discontinued support for iOS 8

Ratings and Reviews

4.4 out of 5
506 Ratings
506 Ratings

Multiple Reinstalls of App

I like using Proton to encrypt my emails, and it works great for me on Mac. However, in the two months I’ve had the app on my iPhone (always keeping iOS updated to the most recent), I have had to delete and reinstall three times. The app stops opening for me. I try to open, it shows it is loading for a couple of seconds, and then crashes.

When I reported the issue, I was told to update my iOS, which I had stated in my submission was done before sending the bug report. The alternative offered was to join the Beta. I am not comfortable with participating in Beta testing. Otherwise, there was nothing else to offer. I am not happy with this response as it seems others use the app without this issue and give 5 star ratings. I gave 3 stars because when it works, it’s great. But until this issue I am experiencing is fixed, there will be no improvement in my rating.


Amazing Privacy-Focused Email

I love ProtonMail! I’ve been a paid subscriber for several years and a user of the iOS app since it’s inception, and I am very happy with the quality of service, friendly UI, and focus on privacy and security.

That said, I’d love to see just one or two changes. First of all, the preview notification of emails only shows the Title field. I have no problem with not showing a preview of the body of the email, but I would love to know who the email was from! If the sender would pop up in the notification, it would be perfect. Maybe there’s a way to do this, but I’ve looked and haven’t seen anything.

Secondly, as an admitted Apple fanboy, I would also love to see an Apple Watch app for checking messages quickly or when I’m away from my phone/desktop. Now I’m not super technical but I’m sure there’s some technical thing with privacy and encryption and whatnot and displaying messages on the Apple Watch, but it’s still something that I would like to see if at all possible.

Other than those suggestions, this app and ProtonMail are about as perfect as email can get. I whole-heartedly recommend it to everyone!


Fantastic app

I had done a lot of research on various different companies that had end to end encryption and came across this company about a year ago. At beginning it was a little getting use to how it works but once I did I loved it and still do.

One thing that would be nice; however due to end-to-end encryption (I truly love this company) I’m not sure possible; is to be able to open two email address that I own in the app. Not necessarily at same time but rather be able to switch between two addresses.

If not possible I would completely understand I would much rather have the satisfaction of knowing that my data is safe which is what I currently have using Proton Mail. Awesome app!! Nicely done guys.


Proton Technologies AG
166.5 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Dutch, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Romanian, Russian, Spanish, Turkish, Ukrainian
Age Rating
Rated 4+
© Proton Technologies AG
In-App Purchases
  1. ProtonMail Plus (1 year) $59.99


  • Wallet

    Get all of your passes, tickets, cards, and more in one place.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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