[ZenFone 2 Themes and Apps] dreckneck:
To do list:

Low light mode

Picture format selection

Slow Sync Flash

And maaaaany other things...

Changelog:

Version 3.5.0:

Optimized APK size: from 6MB to only 2.2MB!

Better configurations switches's colors

Ultra fast picture saving thanks to asynchronous IO

Display camera aperture below shutter speed value

Added a new free-lens-camera-like effect

Fixed Original Size DNG tags

Fixed a minor interface bug

Version 3.4.0:

Optimized memory usage when saving raw pictures

Faster DNG compression using multiple processor cores

Less processor usage and garbage-collection-related FPS drops due to logcat background processing

Optimized update interval of the exposure metering features

Migrate our project to AndroidX

Added a switch to disable raw digest generation

Flash focus (beta)

Fixed the dates-related tags in Exif's data

Version 3.3.0:

Started using Adobe's DNG SDK to save the pictures

The raw files now can be losslessly compressed

The raw files are now are compatible with almost every RAW editor

Picture size selection enabled

The alternative color profiles are now saved on every raw file

Increased front camera screen flash brightness a bit

Version 3.2.1:

Several bug fixes (su shells, UI sliders, camera opening...)

Advanced Black Level Calibration

Simple tone curve

Camera lens vignetting toggle

Invert front camera pics toggle

New alternative color profile

Version 3.0.0:

Different white balance modes + manual white balance

The app's UI now auto-rotates

Fixed touch focus touch position

Added touch exposure metering

Reduced GPU overdraw

New logo! Made by Nazmul Hasan

Screen flash for the front camera

Advanced Lens Shading Correction implemented

Take pictures with volume down button/headset button/camera button (if present)

Focus with half-way pressed camera button (if present)

Fixed small graphics glitch when starting the camera

Fixed the shutter speed selector

Re-done the front picture mirroring due to incompatibilities with raw converters

Recalibrated the Zenfone 2 cameras under the Standard A illuminant

Version 2.3.1: (Quickfix version)

Fixed a not-so-rare race condition bug that crashes the app during its initialization

Fixed the shadows of certain buttons of the main UI

Removed some unused layouts from the main UI

Version 2.3.0:

Fixed a small glitch in the lower portion of the screen when the app is starting

The raw pictures now have the right rotation applied

Pictures taken with the front camera are also properly mirrored

ISO and shutter speed metering for the Zen2/Zoom front camera!

Fixed a weird bug in the lens shading correction algo

New gain based auto white balance algorithm that *should* always work

Version 2.2.1:

Focus peaking when using manual focus for a Mirrorless-like experience

A little bit faster picture taking on the Zenfone Zoom front camera

Version 2.2.0:

Added proper focus mode selection

Added manual focus (for compatible devices)

New animation when taking pictures

Added Zenfone Zoom to the compatibility list (front camera only)

A more detailed description HERE

Version 2.0.0:

A revamped inner architecture and user interface (with animations)

Added manual EV feature

Added ISO and shutter speed metering

Added a warning when the user is using Lineage OS with buggy camera blobs

Added Zenfone 5 and Razr I to the compatibility list (even though they need more testing)

The app (tries to) auto rotate the pictures (but it still quite buggy)

Added visual feedback when using touch focus

The size of the native tiff library was vastly decreased

Better white balance strategy for zenfone 2's front camera

A more detailed description HERE

Version 1.3.0: (may contain bugs)

Taking and saving pictures are executed in the background! YAY! (this may lead to hard-to-find bugs, however)

Taking pictures with the front camera is FINALLY HERE! (the front camera should work with custom roms using Lollipop's camera blobs! :D )

Some progress on taking raw pictures with the Razr I was done (but it won't work for now)

Version 1.2.3: (Quickfix version)

Better handling of alert dialogs

Force disabling of device list

Version 1.2.2: (Quickfix version)

Better log with some useful debug information

List of supported devices is temporarily disabled

Version 1.2.0:

(beta) Manual ISO: from 50 all the way up to 1600!

(beta) Manual Shutter Speed: short exposures like 1/10000s and long exposures like 32s!

Version 1.1.0:

DNG creation process updated with a WAY BETTER code! (Including better exif data!)

Now the app contains a list of supported devices and supported features (currently only ZE551ML and ZE550ML are supported)

Touch focus!

Changed some white balance calculations (need your feedback on this!)

Version 1.0.1:

The apk now contains only x86 and x86_64 compiled libraries.

Fixed a small bug when the flash button didin't update.

Now it should work on non-stock roms. Edit: it installs but crashes.

Minor updates on the DNG generating process.

Version 1.0.0:

First app release