Hi Haskellf,
Due to the large volume of questions and comments concerning the Engine, we did not have a chance to respond to your post at the time you submitted it. However, if you are still interested, here’s how you can launch your project to an Android device for testing:
Once you create a successfully signed package for Android the resulting folder will include an installer. At this point, zip the folder and provide the end user with a link to dropbox, google drive etc. They will need to open this on a computer, then use the installer to launch to an android device plugged into the computer.
Another route would be to launch straight to their device from UE4 on your machine.