“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 1.11.6

- Error message "Unable to parse token" was shown for some users when logging in
- The padlock icon was missing on certain messages
- Replies to messages were sent to the senders address and not to the “Reply to" address
- Opening a contact with a large PGP key attached froze the app
- App crashed on the verification page when signing up
- 'invalid modulus signature' error was shown when changing the password
- App crashed when swiping messages on iOS 9
- Accessing service plan crashed the app on iOS 9
- Contact suggestions in the composer were hidden by the keyboard on iOS 9
- Sharing images or posts resulted in an empty message in some cases
- App crashed when importing some attachments on iOS 9 and iOS 10
- Remote image content was not loading on iOS 9
- Contact suggestions sometimes were not complete on iOS 10
- Message sent from Apple Mail via Bridge crashed the app
- 'Invalid email address' error was shown after copy-pasting email verification code
- Cancel and send buttons were displayed incorrectly when using the share option
- Using non-English ASCII characters resulted in an incorrect error message on signup
- Message details layout issue in landscape mode
- Messages sent to couldn’t be forwarded from free accounts
- The labels for email were not displayed properly
- Contact suggestion dropdown blocked the discard/save draft option on iPad
- Composer layout issue when the app was in multitasking mode on iPad
- Reply all added the recipients address in some cases
- Attachments were not included in some cases when forwarding PGP-encrypted emails
- PGP Mime email encoding
- Sending Message while offline mode resulted in message being sent twice
- URLs in contact view were not clickable
- '+' button for adding a new URL in contact editor did not work
- Contact notes couldn’t be deleted in some cases
- Missing capitalization for data fields in the contact editor
- The ‘To’ field is now in focus when forwarding a message
- Tapping a push notification opened the message twice
- Auto-lock time for Touch/Face ID did not working as expected for some settings

- Contacts loading in the contact list
- Enabled sharing from the default iOS Notes app
- Show the BCC field in message details
- Removed iCloud sync for ProtonMail application
- Text was cut off in some languages in the login screen
- Displaying multiple labels(more than 5) inside messages
- Check for new messages upon receiving a network connection


- General string fixes
- Add Croatian language

Ratings and Reviews

4.0 out of 5
121 Ratings
121 Ratings
Ottleberg ,

Impressive but needs work

I am very happy with Protonmail in terms of security and things, and the app is definitely easy to use.

The only thing I would like to see is an option for push notifcations where you get a banner/alert but it doesn't display the actual content of the email (perhaps just the sender). This is something already implemented by many messaging apps, and considering how security and privacy is such a big part of the company's identity, it would seem like a very good idea.

It could just be that this is already an option and I simply haven't figured out how to do it yet, and if so I would greatly appreciate if you could instruct me on how to do so.

DebbieDebsXoXo ,

I like the idea

This is a fancy concept, but the app still isn’t sophisticated enough and my user experience isn’t always smooth. I have a couple of annoyances, the first one being that I wasn’t able to copy an email address from the list of CC recipients. Number two: I hit “send” on an email and thought it had been sent only to see later that it was still in the drafts. The wifi signal is a lot weaker in the bedroom, so that might have caused the problem, but I think the app should at least notify you if something like this happens.

RichardOfHerts ,

Less than ideal for email organisation.

Seems to be forward thinking in terms of privacy and security, but for all but minimal use, needs more work to turn it into a practical product before you can make it your main email client.

Put simply, as the product currently stands, as the volume of emails builds up, things get difficult to manage very quickly.

My recommendation is that if you care about security and privacy, that you buy into the product with a view to making it your main email client when the product is more mature and makes managing emails easier.


Proton Technologies AG
159.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Catalan, Croatian, Czech, Danish, Dutch, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Ukrainian

Age Rating
Rated 4+
© Proton Technologies AG
In-App Purchases
  1. ProtonMail Plus (1 year) £54.99


  • Wallet

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

  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

More By This Developer

You May Also Like