Let me recommend you Sicher, a new free messaging app.
Sicher (pronounced “Zee-her”), is a German word for both “safe” and “secure”.
Google Play link
App Store link
Microsoft marketplace link
What makes Sicher different:
- end-to-end encryption of text and voice messages, pics, locations, PDFs, docs and spreadsheets
- encrypted group chats
- anonymous push notifications
- self-destruction message settings
- servers are located in Germany only
- Sicher is truly free and multi-platform
Thanks and regards,