The app, called Sphere, was a hub for group chats
https://www.theverge.com/2021/10/21/22738124/twitter-sphere-messaging-app-communities-dm-features
Twitter bought a messaging app to help make DMs and Communities better
Submitted 3 years ago by realcaseyrollins to Tech
https://www.theverge.com/2021/10/21/22738124/twitter-sphere-messaging-app-communities-dm-features