Signal Free download Secure open-source messaging app focusing on private chats, encrypted calls, and minimal data collection Free download Secure open-source messaging app focusing on private chats, encrypted calls, and minimal data collection Vote (1 votes) Program license Free Developer Open Whisper Systems Version 7.53.0 Works under Mac Also available for Android , Windows Vote (1 votes) Developer Open Whisper Systems Works under Mac Mac OS X Program license Free Version 7.53.0 Also available for Android , Windows
