Proton has rolled out a major update to its Mail app for iOS and Android, introducing a completely rebuilt interface alongside a new offline mode that lets users read, write, and organize emails without an internet connection.

First up, the privacy-focused email service has moved the compose button from the top-right corner to the bottom of the screen for easier one-handed access. Proton also claims the updated app makes scrolling, archiving, and replying twice as fast compared to the previous…