Core Apps » ChatSecure:Android

At first try ChatSecure worked fine and I established a secure connection and had a smoothly running chat conversation. However, a day later the encryption just won't start anymore. It indicates a loading process which never seems to result in anything. Now, if I try to send the message regardless, in an unencrypted way it still does not go through. An "x" appears, saying that the message did not reach the other end. In setting I did NOT force encryption, so it should normally work. In this state the app is unfortunately unusable and I have a hard time convincing friends of What'sApp and Viber alternatives.