@voltagex The most obvious answer is using your mobile, where international calls come bundled into many plans.
I’ve a SIP number in the UK and one in the US; and just program a hardware phone with them, but this is very much not a non-techie solution.
https://toomanyadapters.com/with-skype-gone-whats-the-best-app-for-calling-overseas-numbers-now/ mentions “Viber Out” as a contender.
@voltagex Have you investigated MagicApp? I use it to call US phone numbers, but it looks like calls between people that are both on the app are included in all plans:
https://www.magicjack.com/account/mjLandingpages.do?page=index
@voltagex It's easy to use an Amazon Echo Show, if you happen to have one. I make free calls with it, but I am in the UK. I think there is a restriction on the number of contacts you can make free calls to, but if you are prepared to speak or type the number....
Also I use Voipfone.co.uk which has its own app called Softphone.
#voip #amazon