1. Google Duo

Pros 1. Allows a group video call with up to 32 people 2. Fun AR effects 3. Uses end-to-end encryption 4. Google duo is a free video edutech call app

2. FaceTime

Pros 1. Allows upto 32 participants in a group video call  2. High-definition video quality 3. Intuitive user interface

3. Facebook 

Pros 1. Helps conduct both instant and scheduled meetings  2. Available on desktop, android, and iOS  3. Enables you to connect with your Instagram contacts and facilitates cross-app calling

4. Zoom

Pros 1. Free HD meeting app  2. Allows up to 100 participants in a group video call 3. Low bandwidth requirements 4. Screen sharing