Social Networking
Threema. The Secure Messenger
Threema is a messenger with private chats, calls, and file sharing using a Threema ID.
Consider it if your group can switch together and prefers an account that does not require a phone number or email.
The developer describes end-to-end encryption and contact verification through QR codes.
Keep in mind: People you want to reach need Threema; verify devices, backups, and identity settings for your use.
Inside the app
Official product images
What you can do
- Send messages, files, and voice notes
- Start voice, video, or group calls
- Verify a contact by scanning a QR code
Good for
- Groups that prefer ID-based messaging
Consider alternatives for
- Anyone who needs to reach people who will not install the app
Limitations & considerations
- Captured minimum: iOS 18.0.
- People you want to reach need Threema; verify devices, backups, and identity settings for your use.
Privacy & permissions
The developer says a phone number or email is optional and describes end-to-end encryption for messages and calls.
Sources & review notes Updated Nov 11, 2026
Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.
- US App Store developer description
Complete description, download price and compatibility metadata captured 2026-11-02.
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