I have an Android 4.4.2 unit that has a custom application that needs to be launched on boot and when the user presses the home button. As it stands now, I can press the home button and get a list of launchers that can be used, unfortunately the app I'd like to use is not on this list. This unit is rooted and unlocked but, isn't our unit, so I can't (or shouldn't) install apps to get this feature working. Is there an android vanilla way of choosing what app you'd like to use, even if it isn't on the list of launchers. I can sideload an application if I absolutely have to, but I'd rather not as I'm not sure how the company renting these to us would feel about us adding apks to their device.