Mynigma icon

App Specs
File size:
10.43 MB
August 8, 2014
March 30, 2016

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Lightweight email client with award-winningly simple, secure encryption.

Strong device-to-device encryption protects messages sent between Mynigma users.

This is a free version for personal use. No hidden catches like ads, in-app purchases or paid upgrades. Just free.


Mynigma is for everybody, not just computer nerds. That's why we have put the encryption where it belongs: in the background. Sending an open message to another Mynigma user activates the encryption completely automatically. Your reply and all future messages will be encrypted by default. Just lean back and let us do the work.


Most of us have nothing to hide. Yet in the offline world we often use letters, not postcards, because even seemingly trivial information is worth protecting. Once on the internet, our data cannot be withdrawn. It is a goldmine for criminals like scammers and identity thieves, as well as advertisers and insurance companies. How it will be used in twenty years' time is anyone's guess.


Strong encryption ensures that your data remains yours, stored only on your devices. Even we cannot read encrypted messages, nor can your email provider.

For more information on email privacy, Mynigma and encryption please refer to our website


Keep your accounts:
No need to change your address, just use your existing accounts.

IMAP/SMTP support:
Any IMAP/SMTP-enabled account is supported.

Gmail labels:
Supports Gmail labels.

Collated folders:
View messages either by account or in collated folders that span across accounts. No idea which account you sent that message from? Just have a look in the collated „Sent" folder.

Feedback button:
We are constantly improving Mynigma. Use the feedback button in the app to tell us about features you would like to see.

Easy fingerprint checks:
Compare a fingerprint over the phone or scan a QR code to prevent man-in-the-middle attacks. Such attacks are rare, as they require privileged access to the email infrastructure. However, if you suspect being targeted by an email provider or a government agency, comparing fingerprints will make it much more difficult to eavesdrop on your communications.


POP3 support
Send large attachments as links
Seamless integration of S/MIME and PGP


Automatic encryption:
Other Mynigma users are discovered completely automatically. No need to generate or exchange keys by hand. Of course you can still compare fingerprints for added security.

Genuine device-to-device encryption:
The keys needed to decrypt your messages stay on your device (and any back-ups you make). They are never sent to us, your email provider or anybody else. This way your data remains yours.

An ordinary email can be sent with arbitrary sender information. Encrypted messages use electronic signatures to verify that they really were sent by the specified contact.

Secure algorithms:
We use RSA with 4096 bit keys and OAEP padding, AES in CBC mode with random IV and 128 bit keys, SHA-512 for hashing. Feel free to check our code, it's open source.

Encryption of attachments and subject lines:
The point of a subject is to describe the contents of a message. That's why we have taken care to ensure that Mynigma, unlike many other solutions, also encrypts subject lines, as well as bodies and attachments.

Effective content filtering:
Harmful content is filtered through our own, open-source implementation of HTMLPurifier for Objective-C.

What's New
## Usability

Much faster, more efficient message checks and lower memory footprint.

In response to your feedback, we have also added folder management capabilities.

## Privacy

Newsletters, advertising etc. often contain tracking pixels that monitor your reading habits. Mynigma now disables many kinds of tracking pixels. In addition, the download of remote images can now be deactivated completely.

Mynigma (org.mynigma.mynigma) is a Mac software application that has been discovered and submitted by users of The latest version that our users have reported running on their systems is Mynigma 2.14.43.