I use the ProCamera app. Gives you a lot more latitude than the built-in camera app if you want more manual control. I love it!How'd you get the moon so dark with an 13PM? Every time I try to photo the moon with mine, even with nightmode off, and the exposure slider all the way down, the moon still is so bright all detail is hugely blown out.
Halide Mark ll is also a good pro manual camera app.
Of course, it also depends on the time of day and how much ambient light there is when shooting the moon.