https://arstechnica.com/gadgets/2023/11/nothings-imessage-app-was-a-security-catastrophe-taken-down-in-24-hours/

It turns out companies that stonewall the media's security questions actually aren't good at security. Last Tuesday, Nothing Chats—a chat app from Android manufacturer "Nothing" and upstart app company Sunbird—brazenly claimed to be able to hack into Apple's iMessage protocol and give Android users blue bubbles. We immediately flagged Sunbird as a company that had been making empty promises for almost a year and seemed negligent about security. The app launched Friday anyway and was immediately ripped to shreds by the Internet for many security issues. It didn't last 24 hours before Nothing pulled the app from the Play Store Saturday morning. The Sunbird app, which Nothing Chat is just a reskin of, has also been put "on pause."

The initial sales pitch for this app—that it would log you into iMessage on Android if you handed over your Apple username and password—was a huge security red flag that meant Sunbird would need an ultra-secure infrastructure to avoid disaster. Instead, the app turned out to be about as unsecure as you could possibly be. Here's Nothing's statement: