These are the main characteristics and advantages of Threema’s desktop app / web client:
It allows you to use Threema on the desktop without compromising security
It reduces the digital footprint to the minimum by establishing a direct connection between desktop and mobile device (Android)
No mirroring of the user’s message database – neither on a server nor on the desktop
The web-client is platform-independent
WebRTC, a tried and tested open standard for direct communication between two devices (Android)
SaltyRTC ensures a secure connection between browser and mobile device (Android)