Anti-Features:
NonFreeComp (the application includes non-free components):
⇒ The app contains libraries of Google Mobile Services, Google Play Core, Firebase.
NonFreeNet (this application promotes/depends a non-Free network service):
⇒ The app connects to Google servers (Firebase/cloud messaging, PlayStore).
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 sea