“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 1.9.2

Fixed incorrect auto show image state.

Added warning for phishing messages
Added "Report phishing" option in the message
Added option to attach multiple files in the composer
Improved attachment listing in the message view
Improved share option stability
Improved local cache stability
Improved localization for some languages
Improved error messages
Fixed composer layout issues
Fixed the rendering issue in imported messages
Fixed special characters display issue in messages sent from the app
Fixed the sharing links from Safari that couldn't be opened
Fixed the signed lock icon for outside messages
Fixed the layout issues in some languages
Fixed the layout issues on smaller screen devices
Fixed navigation issues
Fixed a message signature verification issue

Ratings and Reviews

4.4 out of 5
475 Ratings
475 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!


Excellent encrypted email app

Update: the issue I mention below has been remedied in the latest update. Thanks devs!

Overall I’m happy with ProtonMail - they’ve got a nice app and provide a secure service. However, I really wish swiping left on a message in the inbox screen would send the message to archive instead of spam. I don’t know about others, but I hardly ever get spam, it seems like an infrequently needed feature to be given such prime UI real estate. Archiving on the other hand I do all the time to keep my inbox uncluttered, and I have to invoke the drop down menu to do it. Anyways, I would still recommend this service, but would like to see that feature changed.


Proton Technologies AG
146.4 MB
Requires iOS 8.0 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


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