IzzyOnDroid

ProtonMail is the world’s largest encrypted email service with millions of 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.

With the ProtonMail app, you can:

• Create a new protonmail.com 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

Note: the app is using the Sentry.io library. ProtonMail self-hosts the server part, so this is no "third-party" tracking you. Hence the Tracking AntiFeature is not applied.

Anti-Features:

• NonFreeDep: The application depends on a non-free application (e.g. Google Maps) - i.e. it requires it to be installed on the device, but does not include it.
• NonFreeNet: This application promotes or entirely depends a non-Free network service.