Easy to use, works out of the box. I didnt feel any need to mess with settings, it helps cut the contrast down, much easier on the eyes.

amazing add on!

German: Nighteye ist das perfekte Add-on, um jede Webseite im schönen Dunkelmodus zu haben. Es ist sehr einfach zu bedienen und macht das Leben einfach so viel besser. Nach dem Testzeitraum kostet Nighteye 9$ im Jahr, was aber meiner Meinung nach viel zu wenig ist. 10/10

English: Nighteye is a perfect add-on for setting any website to dark mode. It's really easy to use and makes life in any way better. After your free trial, Nighteye costs about 9$ which I personally find too cheap. 10/10

Reading at night has never been more pleasant with dark mode on especially for person like me who works all night. Thanks Night Eye! - https://nighteye.app/wikipedia-night-mode

Great dark mode addon, customisable, fast and works the way you'd expect it to.

The best dark mode add-on, so far no issues at all for most websites. I love it!

Reading Wikipedia has never been more pleasant with dark mode on.
Dark eye has made work easier for me.

Night Eye ist super, es macht genau das was es soll. Helle Webseiten auf die Dunkle Seite bringen! Night Eye ist nicht kostenlos aber 9€ im Jahr sind okay.

I am using Deriv TradingView page and it was a pain to see too white at night, the best for my eyes.

This is truly a godsend if you often find yourself spending your nights toiling away on a computer in a dark room. I have used this nonstop since I first found it years ago.
MINIxSQUATCH

I just stumbled upon this add-on when I was searching for a dark mode option for a website. The dark mode this app does is more pleasing in the eye than the native dark mode of my OS.

I have tried a couple of dark mode extensions/apps but so far Night Eye is the best I've used. It has the most pleasing in the eye conversion of dark mode and it doesn't completely invert the colors and just integrate it in a good way. It's relaxing to my eyes.

I really like how this can turn the dark mode on any website and could be adjust it.

the best

you can choose which sites to apply dark mode and which not. this way if a website already has dark mode you can disable the extension from that site only (or more) and keep using the site's own dark mode. works pretty good id definitely reccomend.

Great app that works as intended. Surprisingly extensive list of customizable features such as programmable schedule and multiple modes which allow the user to adjust settings like brightness, contrast, warmth, etc. Overall, the app is easy to use and does exactly what it says.

I've tested many Night Eye-style extensions, but none compare to it, you don't need to do anything after installing it, it converts pages to night mode automatically, it's simply perfect!

ong pretty good

I don't get how people didn't know it was a trial, they are pretty clear about it when I installed. But this is the only app/extension on that has completely helped with my time on the computer. For me it was worth the 1 time $40 just to know I would have these features. It's cheaper than migraine meds & glasses

Night eye has really helped my eyes while I'm reading , or trying to fall asleep when I'm done using it!

Dark mode is my default on pretty much any device I can activate it on. I absolutely hate the fact that there are so many websites that don't have a dark mode, but what I hate even more is that when I'm up late per usual and I open certain websites and get flash banged. So I checked online for something that would protect me from being flash banged at night and found Night eye and I gotta say its pretty great!

Night Eye is a browser extension that enables dark mode on almost all websites, including Facebook, Google, Quora, Github, Stackoverflow, and Wikipedia, among others. It is available for Google Chrome, Mozilla Firefox, Opera, Vivaldi, Yandex, and Microsoft Edge . The extension offers three different modes: Dark, Filtered, and Dynamic .
According to user reviews, Night Eye is an excellent dark mode extension that is highly customizable and has bonus features that help make some websites more compatible with dark mode 1. However, one of the downsides is that it requires a paid subscription or a initial payment to purchase a lifetime license for multiple browsers. 
Night Eye is also known for reducing eye strain and promoting overall eye health by minimizing blue light exposure and in my opinion is doing the best job in this field.