I’ve been using Skype for cheaper international calls to family that still relies on phones instead of video calls etc. I’ll need to check what happens with my credit. Any recommendations for an alternative?
Google Voice is good. I use it to call from the USA to Australia which is only $0.01/minute and doesn't have any monthly fees. You can see the rates here: https://voice.google.com/rates
I've got an Android phone and you can configure Google Voice so that it's automatically used whenever you make an international call from your phone's regular dialer.
It's a little contentious, but Discord is a solid video chat app. It's good for hop in/hop out for multiple users and you can have a dedicated family chat room on the server too. Very device compatible and resource friendly, and totally free.
I only have to use this occasionally, but on my android I use the app "Talkatone" to make free calls to phones. They have paid plans to keep your number, but I tend to just use new ones whenever one expires.
It might not suit your needs, but it's worked pretty reliably for me for the past 10 years or so.