ProtonMail is the world’s largest encrypted email service with over 2 million users. The ProtonMail secure email app for Android 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.
Using Protonmail ensures your emails stay private and cannot be intercepted or disclosed to third parties. The encryption is done automatically and is completely invisible to the user. It is hosted entirely in Switzerland, under the protection of the world’s strongest privacy laws
Android : http://bit.ly/2uPhfcX iOS : https://apple.co/2JIwzgN