Some people might not want to juggle all of these apps. An easy hack for taking plain photos of the night sky is to toggle your phone's camera exposure.
Simply open the camera app, and tap the screen to focus. This will generate a yellow box. Tap again to the side of the box, and the little exposure "sun" will appear.
Slide the sun up or down to increase or decrease exposure. You want lower exposure for night photography.
The only issue: if you're shooting meteors, the tails might not show up in the photos, or they might be really blurry. Still, it's better than nothing.