[Miscellaneous Android Development] DerTeufel1980:
Update 20160914:

Build 20160914 - Stable 1

Changelog:

Updated to 7.0.0_r6 (security patch level: September 6)

Improved Smartwake

Fixed data usage monitor

Fixed data saver

Fixed other small issues

Build 29102016 - Stable 2

Changelog:

Updated to latest Nougat: 7.1 [ NDE63P ]

Dual ringtone (choose a ringtone per SIM)

Fixed some RIL issues (airplane mode, sim activation)

Fixed some wifi issues

Fixed some audio problems (e.g. whatsapp audio recording)

Improved compatibility between snap camera and mtk

Fixed video recording issues (e.g. Snapchat video recording)

Enabled 'Night Light' feature of Android 7.1 (automatic mode not finished by Google yet)

Added ambiet display (including settings part)

Added substratum support

Built as user build (no su binary)

Reworked M.A.D. settings (fixed various problems)

Fixed HDR camera mode

Added Snap Camera app

Added standalone file manager

Added sim on/off switch

Added signal bar color option

Added custom headphone control (3 buttons: the right and the left one (normally only for volume) can switch now between tracks with a longer click)

Various other changes including fixes for gapps

Fixed FMRadio issues (volume control, recording)

Fixed sensor calibration

Fixed wifi issues (5ghz wifi hotspot)

Fixed DRM issues

Updated apns

Switched to new audio policy configs

Fixed & reworked many other things (e.g. improvements)

Build 16122016 - Stable 3

Changelog:

- Update to Android 7.1.1

- improved substratum support (OMS7)

- added option to control scroll friction and velocity

- added PixelUI navbar

- added 'longpress button, to kill foreground app'

- fix screen unpinning

- fixed 'prevent audio ducking'

- improved webview package handling

- fix theming of 'button settings'

- add Russian translations by Borizzz (more translations to come)

Build 17122016 - Stable 4

Changelog:

- Fixed FmRadio

- Fixed missing Fingerprint option

Build 19122016 - Stable 5

Changelog:

- Fixed FmRadio (for real)

- Fixed Sim crashing by using GPS

- Fixed manual and autofocus

Build madOS [7.1.2] 20170527 ( Stable 6)

Update to 7.1.2

Patch Level: May 2017

madOS version v1.1

Introducing:

madlauncher: (AOSP based, but on mad steroids with several options)

madCamera: Our own camera (with several improvements for MediaTek based devices)

Telephony :

RIL improvements

Fixed a badass NullPointer on Telephony (Operator related)

Network / SIM Status fixes

wlan and connection improvements

Other Features:

Camera improvements & fixes

Added sdcardfs support

Support for the new substratum (madOS is now an official supported rom)

omnijaws weather (Lockscreen & Status bar,etc)

--> with huge madOS improvememts over the original implementations

Power Menu Options

One handed mode

Lockscreen PIN quick unlock & quick unlock improvements

Added SIP Options

QS (Quick Settings) Options

Custom Carrier Label options

madOS NavBar: fixup

Bluetooth: battery status options

AlarmsBlocker

WakelockBlocker

Recents Options

Pie: New SlimPie (ported by mad from lp to N) & improved

Tiles:

CompassTile

NFC Tile

Compass & Language toggle Tiles

madOS Tile

etc ..

Other fixes & Improvements:

couple GAPPS related issues

location provider errors

SchedulePowerOnOff

facelock

Removed Gello , Welcome chromium

faster app switching

AppOps

gesture events

PhoneWindowManager

anr's

NPE's

memory leaks

masOS offline charging animation

Dashboard & madOS settings cleanup

Miracast issues on some dongles

There's other fixes & features included on this release

--> Too much to write on a changelog