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Proton Begins Rolling Out Rebuilt Mobile Mail Apps With Offline Mode and Faster Performance

A shared Rust codebase positions Proton to ship iOS and Android updates in near lockstep.

Overview

  • The redesigned apps are rolling out gradually on the App Store and Google Play, so some users may not see the update immediately.
  • A complete offline mode lets users read, draft, and organize emails without connectivity, with changes syncing when back online.
  • Proton says routine actions like scrolling, archiving, and replying are about twice as fast compared with the previous apps.
  • Feature parity arrives across platforms, with Android gaining snooze and scheduled send capabilities.
  • About 80% of the code is now shared in Rust while retaining native apps, laying groundwork for faster Mail releases and upcoming Proton Calendar apps.