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NightTone makes your screen more comfortable, enjoyable and healthier by shifting the colors of your display to a warmer, eye-friendly palette. It makes you sleep and feel better.

It's perfect for everyone's health, especially for people with visual perception problems, light sensitivity or discomfort.

• The science behind the app
The monitor's blue light tricks our circadian rhythm (our natural body clock) into thinking that it’s daytime. It suppresses melatonin (that sends "time to sleep" cues) and builds up histamine that helps wake us up, boosts attention and reaction times. In other words, it resets that feeling of tiredness and hurts our sleep cycle.

Just remember: It's bad to be exposed to sleep-inhibiting blue light during the night.

• Predefined color pallets for common scenarios
- Warm orange for late working hours
- Soft black or inverted colors for dark rooms
- Noisy green for long text reading
- Silky blue for rooms with artificial light
- Tender white for movies night or dark photo work
- All colors are adjustable and can be changed to anything you are comfortable with

• Features
- Change the screen brightness and palette to warmer colors
- Configure the display to virtually any color you want
- Invert the screen's colors for better usage in very dark rooms
- Multiple monitors supported
- The app can active itself only during nights (and you can customize the activation hours)
- Start at login, schedule the app and forget it exists. Just enjoy the benefits
- Easy to use and there is absolutely no configuration required

• Support
We read your support emails every day, day by day.
Write with confidence any question, feedback or complain and you will receive an answer in a very short period of time.

What’s New

Version 2.6.0

• Bug fix: NightTone will not close when a screen saver starts or when you monitor goes to sleep

Ratings and Reviews

Shazamer ,

Fine for one monitor, multi-screen is inconsistent

Tried this because I wanted a simple way to adjust brightness on both monitors. It works as expected on one monitor, but when using on both it makes my laptop screen way dimmer than my external monitor. I'm talking an extreme difference that makes it unusable. Other apps I've tried that dim screens don't have this issue.

Developer Response ,

Dear user,
I think your monitor reacted to the ambient light and got dimmer. You can increase the brightness manually on the laptop, since you laptop and solve this problem.

AMatFB ,

Great when it works

It works sometimes but not always, have no idea what disrupts it. I've reached out for support but it's hard to troubleshoot, haven't been able to get it to be consistent.

Developer Response ,

Dear user,
Thank you for your review, I'm taking notes of all of them.
But can you give me more details about the problem? The app stops working after some time? Are you sure you did not scheduled it?
You can also write me an email to and for sure we can find a solution for this problem.

JackyK2 ,


I used this for a few months, and liked it except that it bumps up the screen brightness when it’s switched on, or when you change the color. It goes bright, and then you have to hit the dim button to get it back to the correct brightness. It got annoying to be blinded for a second every time I turned it on. Plus, the color seems to cloud over the black areas of the screen, reducing contrast in a bad way. The scheduler is a nice feature, though I personally didn’t use it much, and I liked the ability to customize the color.

Developer Response ,

Dear customer,
What you are describing is actually the built in macOS auto-brightness functionality. You can disable it if you go to your Mac's System Preferences > Display > click the Display tab > uncheck the "Automatically adjust brightness" option.
For more details or help you can send me an email at and I will gladly help you.


Denk Alexandru
3.1 MB

OS X 10.10 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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