https://silentel.com/
Silentel - Secure mobile communication
Silentel protects your voice calls, messages, chats, sensitive documents, photos or any files against eavesdropping and interception.
secure mobilecommunication
https://play.google.com/store/apps/details?id=com.Silentel
Silentel - Apps on Google Play
Silentel protects your voice and data against wiretapping and interception.
on googleappsplay