As a non-Nikon user (a Canon user), I see two options:

• Select the P mode. It's reasonably similar to the full auto mode. You may need to pop up the flash manually if you have a camera with an integrated flash and wish to use it. You don't need to adjust the settings of the P mode at all, because it does everything apart from popping up the flash automatically.

• Select the A mode and dial in the aperture value that you want. This, too, will do auto-exposure...but it gives you control over the depth of field. The aperture is a setting that can very well be the same for all photographs you take.

• Select the S mode and dial in the shutter speed value that you want. This, too, will do auto-exposure...but it allows you to ensure that a specific shutter speed be used (fast enough to capture action, for example).

M mode may be useful in flash photography giving you the freedom to adjust the relative brightnesses of the background and of the subject. The longer the exposure, the brighter the background. (This is called mixed lighting - where the subject is lit by flash and the background by ambient lighting)

Personally, I prefer the control over the aperture, and use the A mode. Your camera may also have an Auto-ISO setting which may come in handy using the A or S modes over a long time or in changing light. YMMV.

As for my Canon, I don't even remember if all settings can be controlled from the Canon Camera Connect app. I don't care. I just set roughly the settings I want on the camera, use auto-exposure and then remotely release it.