Need improvements

App needs to be upgraded to allow:
1. Siri support to send Threema messages
2. Audio calling
3. Group audio calling
4. Video calling
5. Group video calling
6. Siri support to place calls
7. Answer audio calls right from the lock screen like standard phone calls
8. Ability to recall any sent message
9. Apple Watch support

Ztext about Threema. The Secure Messenger, v2.8.0