Wilkie-Talkie is a push-to-talk FaceTime audio connection and is all data.
If yo have limited cellular minutes, but a much more generous data limit, it is an ideal way to have a very long conversation, and only get charged for actual talking, and not for silent periods.
On use for me is when my my wife and I start up the lawn sprinkler system, we have to make sure all the heads come up, and the snowplow guy did not cut off and heads, or heads are not blocked by thatch, or are leaking etc…
But the controller is in the basement. So one of us (me) switches zones, the other (Wife) walks the yard checking all the heads in each zone.
Wife will use Walker-Talkie to tell me when to switch zones.
This can take a long time, and making a Cellular call would be a waste.
This spring will be the first time we use Walkie-Talkie. Previous years we used Zello, a Walkie-Talkie app via our iPhones.
I’ve used it in the supermarket when I needed Wife input on a specific item to get.
I’ve used to find my Wife when we both drive from different locations and meet up at the mall.
etc…