If you're looking to capture a timelapse of the Milky Way with your phone in the app like I did here (https://youtu.be/guLRswshIzA?t=15) then I can give you some pointers.
You want to find a place away from cities and artificial lighting where you can avoid light pollution. For the timelapse video above I was in the mountains where there was very little artificial light. Going to a place with a very dark sky will enable you to capture more of the night sky (and it's an amazing experience in itself).
In Velocity Lapse open the camera settings and set ISO and shutter speed.
Generally, you can capture the brightest stars in the sky with a shutter speed of even just 1 second, but a shutter speed of 6, 8, 10, or even 30 seconds will produce much better and impressive images. I'm pretty certain I used something around 6 seconds shutter speed for the timelapse in the video I linked.
ISO brightens your image at the cost of more noise (or grain) so I try to keep this around 1000 or below.
Set focus to infinity (this varies by device so you have to experiment ).
Face the device camera in the correct direction. (Google something like "which direction is the milky way in the night sky tonight" to find out the direction).
Hope this helps 🙂
Note: The shutter speed and ISO ranges in Velocity Lapse depend on what your device allows third-party apps like Velocity Lapse to access. For shutter speed, this is unfortunately often much less than what the stock camera app can access.
