I'm developing a small react-native application for my Android phone. During the development process, I've had the packaging manager running on my computer, and tested the application on my device. 

I've also made a release, and copied the apk-file onto my device and installed it there, so that I can test the application without a running packaging server in the background. 

The latter is quite cumbersome, so I'd like a way to test the application on my device, and bring the device with me, without going through the hoops of building the application and copying the apk-file onto my device for installation. 

How are other's doing this, how do you test your application while away from your computer (and packaging manager)?