Focus App: Zoom
Minimum Age: 4+
Zoom is "one of the world's leading video conferencing software providers".
With the current UK lockdown in force, Zoom seems to be a popular choice for communication between friends and family. It can be used on a variety of devices and has an age rating of 4+ on the App Store.
Concerns regarding this provider have been raised by a number of different sources with regards to the security and privacy settings.
More information can be found in the below PDF from the National Online Safety Website and the 'Zoom Update' Document.