Plusmessenger is a closed source Telegram app by an evil developer that made a malware WhatsApp Plus mod in the past
He tried to make people pay for WhatsApp Plus mod, and those that pirated it got their phone pictures deleted
He was banned in forums and threatened by lawyers and WhatsApp
Now he's not even complying the GPL license of Telegram and refuses to release the source code. He could be hiding malicious code in his apps, again.