What are people replacing Skype with, for calls to international phones (cell, landline)?

That’s the only thing we used it for (calling relatives who for reasons, are unable to get an iPad and use FaceTime like normal people). We’ve been struggling to find a reasonable replacement that doesn’t look sketchy. It also doesn’t need to be free, we used a Skype subscription so we are ok to pay a reasonable fee.

Viber and Rebtel have come up in my searches but I would love more opinions/options.