%APPDATA%\protonmail\offline_cache\
The Proton Mail Windows app is a significant milestone for privacy-conscious users. It bridges the gap between the high-security world of encrypted mail and the convenience of modern desktop software. If you are looking to declutter your browser and harden your digital communication, the native app is an essential upgrade. 📬
: Switch between Mail and Calendar using the sidebar, just like the web version.
Comparison: The web app via ServiceWorker can also work offline but with stricter storage limits (browser quotas ~50-100MB vs desktop unlimited by OS).
: Run the installer. Once finished, the app will prompt you to sign in with your Proton credentials.
: Enable "Start Proton Mail on system startup" in the App settings to ensure you never miss a notification.
