I may be late to discovering this app, but I found a very relevant use case for me. I have always to be phone free on many ocassions and was happy to get the apple watch 3 with LTE. Now with the model 3, I had to carry my phone everywhere—but what I found with this app and watch app, I can be phone free again. Using this app, I can unlock the car door from my watch and start the car with my watch—all without my phone. This way I can make quick runs without having to carry my phone at all times. So very nifty should you ever need it.