Mobile Development Support With Angular and AngularJS

Hello All, I am a beginner and I am working on a development project, Want to know which one support mobile development angular or angular js. I have worked on angular based projects and According to this post, One of the remarkable characteristics of Angular applications is that they are mobile-friendly. In other words, Angular applications are fully optimized for mobile browsers but not an idea about angular js. Can anyone know about this?

angular is a framework while angularjs was, they abandoned the angularjs