. The official apps for Windows, macOS, and Linux are designed as standard installed applications.
Are you sure you need a USB stick? Sometimes "portable" means "accessible from any device without leaving data behind."
ProtonMail is a popular end-to-end encrypted email service that prioritizes user security and privacy. While ProtonMail offers mobile and web applications, a desktop app is also essential for users who prefer a native email client. This paper proposes the design and implementation of a portable ProtonMail desktop app, enabling users to access their encrypted emails on-the-go, without requiring installation or leaving any digital footprint.

