Roll Call is described as 'Free Audio Calls From Your Browser' and is an app in the Office & Productivity category. There are five alternatives to Roll Call for a variety of platforms, including Online / Web-based, Android, iPhone, Chrome OS and Self-Hosted solutions. The best alternative is Hangouts, which is free. Other great apps like Roll Call are BigBlueButton (Free, Open Source), Google Meet (Freemium), Team.video (Free) and Nettu Meet (Free, Open Source).
Google Meet is a team-focused videoconference app included with G Suite and G Suite for Education. You can join a meeting using your browser, share your video, desktop, and presentations with teammates and customers.
Team.video helps remote teams have happier, more productive meetings by offering user friendly video meetings with agendas, collaborative notes, and emoji responses. No download required and it’s free to use.
Open source video conferencing for tutors - Audio and video: Real-time sharing of audio and video. - Shared whiteboard: Collaborate with students on a shared whiteboard. - Screen sharing: Go to presenting mode by sharing your screen.