I'm not up to date with the recent Android apps, but when I was still using Android, there was not really a good photo app. Many developers don't want to make apps for Android because they need to compile the app for different hardware. iOS only has one set of hardware so it's much easier.
If you use a Canon DSLR, you can consider using the Magic Lantern firmware, which has many features that aid in exposure [exposure simulation (can turn on LV FPS override and exposure override to see very dark scenes like before sunrise/after sunset/with 10 stop ND filter, live histogram, zebras, spotmeter, false colour, waveform], and DOF calculations (hyperfocal distance, lens focus distance and corresponding near and far DOF - provided the lens reports the focus info)
https://play.google.com/store/apps/...GwsMSwxLDEsImNvbS5waG90b2J1ZGR5LmRyb2lkMjIiXQ..
Not sure what is the difference between this one with the iOS one though.
I'm a bit puzzled .. you want to go out of Auto but still you leave the calculations to a tool and just key in whatever the app comes up with? I understand the need for DoF calculations, I use DoF Calculator for Android. But everything else can be done using your camera meter and some brain work. Counting down stops for ND is not rocket science. Shooting RAW eliminates the need for WB games (it's changing throughout sunset / sunrise anyway). Sundroid gives you the sunset / sunrise details for any location (very complicated for SG), but also for the moon. Android 4.2 has a stop watch built in, alternative free offers are plenty.
Sure, it's 3 apps instead of one. But if you want to get away from Auto mode then replacing the cams internal app with a smartphone app is not that smart after all..
I was in the same situation as you Daoyin. I was an iphone photo buddy user.
When I switched over to Android, I was looking for the same kind of app too. Unfortunately there is none. But I seldom use the other tools, only once in a while. So I am using 2 apps now. DoF Calculator and Sun Surveyor.