Well this is a bit of a sweeping statement. I don't think you ALWAYS have to run on your device. Emulators are much faster at launching and getting to it. I us

Well this is a bit of a sweeping statement. I don't think you ALWAYS have to run on your device. Emulators are much faster at launching and getting to it. I use the emulator for a majority of quick fixes, layout changes, API debugging, etc. I move over to the device when things are nearing a point where I need to test real-world things. Using the emulator is fine, just be sure to test on the device before you deploy.