Does anyone know of an app which provides a simulated walkie talkie but over secure IP communication?
I found this one: Two Way : Walkie Talkie
And it probably works, but my partner is on Android and has a phone too new to run the Android version of the same. (Apparently backwards compatibility on Android isn't much of a guarantee?)
Phone calls won't work because we want to use this solution on a trip in a foreign country and roaming is not guaranteed.
So far, Discord is the closest thing we have to a working option, but it is crashprone and particularly on iOS has various audio problems.