 Nothing removing that chat app based on Sunbird. Sunbird has now removed its own app, both nine to five Google and text.com found multiple security problems with Sunbird's implementation. Sunbird was logging and storing messages in plain text in its error reporting software. The tokens used to secure message delivery were sent over HTTP, not HTTPS, which made those tokens easy to intercept. Text.com was able to intercept one of those tokens and then use it to subscribe to the Firebase real-time database, which would notify them every time a message was entered into the database, making it trivial for them to access and read almost every message before they were encrypted. All of this, of course, in violation of Sunbird's promise that all your messages are secure and decrypted.