Threema OnPrem for
Your Platform
Mobile app
![Android](/images/work/screenshots/android/en/dark/group_detail-portrait.jpg?v=3)
![](/images/work/screenshots/ios/en/dark/threema_call-portrait.jpg?v=2)
To activate the app, credentials are required, which your administrator will provide.
Web client
![Web client](/images/screenshots/desktop/en/single_chat.jpg?v=2)
Installation instructions, system requirements, and further information can be found in the Desktop/Web FAQs.
Open web client