Galactic Night [root, Samsung]

NOTICE: Galactic Night has been discontinued, though you are free to keep on using if it works. If you have Android 4.4 or newer, try our Color Changer Free app instead.
Galactic Night is an experimental nightmode app for rooted Samsung Galaxy S2, S3 and Note 1 phones (don't bother trying on other devices) that lets you set various color modes on your phone for use in the dark, to save batteries, for astronomy, ebook reading in the dark (and during the day) and for other purposes. Currently supported special modes on many devices include: red, green, blue, no-blue, sepia, black and white, reverse and outdoor. E.g., in red mode, everything is rendered in shades of red. In reverse, all colors are reversed, which is nice for web browsing at night. In sepia, white is replaced with sepia.

Monochromatic color modes like red and especially green (because our eyes are very sensitive to green light, you can use lower intensities with green than with red or blue and still preserve visibility) can save batteries by using only one color of AMOLED subpixel. Moreover, except on some devices (e.g., the American version of the S3), these modes are designed to preserve maximum device usability: they don't just drop the other components of the colors, but use the overall luminosity of the pixel to set the red or green intensity, which means that even in red and green mode, blue things can still be used.

Because Galactic Night uses your Galaxy phone's mDNIe system, it should not significantly impact graphics speed.

WARNING: THIS IS EXPERIMENTAL SOFTWARE REQUIRING A ROOTED DEVICE. USE IS AT YOUR OWN RISK. In particular, there is a danger that that using modes like red, green, blue and no-blue regularly and for too long, especially at too high intensity, will result in burn-in on the AMOLED display, resulting in a color tint.

The black and white and mono sepia modes are useful for reading ebooks even in daytime with ebook reader apps (like the last version of the Kindle ebook that I tested) that incorrectly use subpixel rendering which results in colored fringes around letters in some orientation. The black and white and mono sepia modes fix this.

Unfortunately, the hardware on the US (or at least Sprint US) versions of the Note and S3 uses a different display controller from the international versions, and this display controller does not work for the black and white or mono sepia modes. I've also have not been able to get this working on 4.3 on the US Sprint S3.

Category : Personalization

Reviews (30)

A. G. u. May 4, 2015

I have samsung galaxy s2 korean version model no. SHW-M250S its not supported please add my phone too.

A. G. u. Jul 14, 2016

It does not support on my samsung a5. Please fix it. This idea of app is wonderfull. Hoping soon

A. G. u. Sep 2, 2018

Really Like Your Work! Unfortunately It Only Works On The Device I Use The Least. But Still, "VERY NICE"!...

A. G. u. Oct 28, 2015

Not supporting for Note 4

A. G. u. Aug 4, 2015

:) appreciated :)

A. G. u. Dec 24, 2013

Great work. Not only does it look awesome but it serves functionality. I keep my device on a windshield mount and when I receive a call or text with screen on replying but with this app that is reduced greatly. No problem running on my note 2... But on my galaxy s3 app would close when screen off

A. G. u. Dec 9, 2013

A friend told me of this app while ago. I don't really hardly ever use but I find it is a really nice root app. If for anything I'd use for outdoor control for seeing screen easier but usually I see my screen just fine. Galaxy note 2

A. G. u. Aug 1, 2014

It show at startup that 'Your device is not rooted or not supported.' But my device is already rooted. Too bad.

A. G. u. Mar 20, 2014

It is not working on my galaxy note 3 with android 4.4 kitkat. Says it has no root or is not supported. Please help

A. G. u. Aug 23, 2014

I have given 4 star only because it sounds so good. But it's not working on my phone Micromax A76. I have sent error log let's see if they fix it for me.

A. G. u. Jun 14, 2014

Though it worked on S3 but still on S4 it always says , device not rooted/ supported . But I have already rooted my phone , and even Root Checker app confirms that . Hope you will resolve the issue

A. G. u. Nov 2, 2014

Light weight and has the potential to conserve your Samsung amoled android phone and phablet. Thanks bro...

A. G. u. Aug 30, 2014

Note 2. I love the red light setting because it allows me to read in bed while not disturbing my significant other and doesn't keep me wide awake with the blue spectrum. Wish there was a non-root version. Would definitely pay for it.

A. G. u. Oct 4, 2014

Just want to thank you from the core of heart for this awesome app. Works perfectly fine on my Note 2. I was really searching for this and came to know about from an Android forum. The Black & White mode is great. Keep up the good work :)

A. G. u. Dec 6, 2014

i loved mono sepia and b/w mode.. bt does it affect my led screen if i use these two modes for long time??? coz u just mention that red,green,blue and no-blue will harm display if used for long time.. so i m confused that will mono sepia and b/w will also harm my screen if used for long time?

A. G. u. Dec 12, 2014

I found that black and white is best, and then I'll invert the colors when I have more white than black on screen (while reading text, you can have white letters on a black background). If you have an AMOLED screen and a compatible device, you can certainly save some battery here. Also, a very simple interface and strait to the point.

A. G. u. Dec 12, 2013

It does colour management correctly - direct manipulation of pixels rather than coloured overlays which INCREASE battery use on AMOLED screens.

A. G. u. Feb 18, 2014

Seems cool, not sure how using 'restricted colors' could result in a burn-in, but this sure doesn't work on an S4 currently.

A. G. u. Jul 25, 2014

Been looking for an app which does black and white for a long time, works on my s3, doesn't work on my s4 though :(

A. G. u. Jul 30, 2014

You had much of the Galaxy S lineup, was hoping it would work on my S4. I know it says it will only work on those phones in the description. . Bummer

A. G. u. Jun 7, 2014

Used to work on note 2, but after update to kitkat (official) not any more. I still use it on my note 8 (which I won't update to kitkat)

A. G. u. Apr 1, 2015

Perfect replacement app for devices without Ultra Power Saving Mode. If I enable the build-in power saving mode in my Galaxy S3 + this Galactic Night app in Black & White, my phone can stand for days without charging!

A. G. u. Aug 1, 2014

When will you guys make an update for the note 3? Seems like its not working my phone is rooted yet it tells me its not rooted and the app doesnt run.

A. G. u. Jan 14, 2015

The red mode is unreasonably useful. Thank you.

A. G. u. Jul 30, 2014

App never checks for root immediate says not rooted which I am please fix that check so it can find root on new devices I might be willing to buy app if it was updated

A. G. u. Aug 5, 2014

Worked great on stock Sprint Note 2 and CM11. Just installed a stock based 4.4.2 ROM and no longer works. I know it's experimental though so that's the chance I take.

A. G. u. May 30, 2014

Wanted something like this for using marine navigation apps at night without ruining "night eyes". Simple and brilliant. Rooted S3 w. Kitkat and navionics!

A. G. u. Mar 6, 2015

Is 4.4 i337 att s4 supported? When i enter the app it sais that my phone isnt rooted or now supported device, dont even ask me for root permissions. Tell me whats wrong

A. G. u. Jul 19, 2014

It keeps crashing every time I try to implement it!

A. G. u. Aug 12, 2014

I mainly use it for browsing and the flipboard app, what a relief from the white background! My other fav mode is mono sepia - very soothing. Thanks dev