
HackerRank
CodeSignal
iMocha
TestGorilla
HackerEarth
mettl
DevSkiller
Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Twinkle Tray
f.lux
DisplayBuddy
CareUEyes
BetterDisplay
Monitorian
PangoBright
A Windows brightness slider and screen dimmer for external monitors, with DDC/CI control, gamma fallback, schedules, app rules, hotkeys and more.

Which is more popular?
Based on our record, Codility seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codility.com | displaydimmer.com |
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| Company | — | 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


The Codility platform includes: CodeCheck - Design role-specific remote skills assessments to screen your technical candidates before moving them to the interview stage. CodeLive - Host technical remote or onsite interviews via our shared editor using a range of templates and whiteboards....
Display Dimmer is a Windows utility for controlling external monitor brightness and contrast from one simple app. It is built for real multi-monitor setups, including desktops, docks, reconnects, sleep/resume, HDR changes, and monitors that do not always respond consistently to hardware...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Codility yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
An Introduction to Codility: The Tech Hiring Platform for Engineering Teams
No Display Dimmer videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Codility and Display Dimmer.
Display Dimmer's answer:
Display Dimmer is built for real Windows multi-monitor setups, not just simple single-screen brightness changes. It supports per-monitor brightness and contrast, All Displays control, schedules, app rules, global hotkeys, linked display groups, and DDC/CI hardware control where supported.
When hardware brightness control is unavailable or unreliable, Display Dimmer can fall back to software dimming, making it useful across more monitor, dock, HDR, and reconnect scenarios.
Display Dimmer's answer:
Display Dimmer is designed for users who want reliable monitor brightness control without constantly opening monitor menus or changing settings manually.
It combines quick brightness sliders, DDC/CI support, gamma fallback, automation, hotkeys, app rules, schedules, and multi-monitor controls in one Windows app. It is especially useful for people with external monitors, docks, multiple displays, or setups where hardware brightness control is inconsistent.
Display Dimmer's answer:
Display Dimmer is for Windows users with external monitors who want faster, easier brightness and contrast control.
The primary audience includes people with multi-monitor desks, developers, designers, remote workers, students, gamers, and anyone who changes screen brightness throughout the day or wants monitor brightness to adjust automatically based on time, app, or workflow.
Display Dimmer's answer:
Display Dimmer was created to make external monitor brightness control on Windows easier and more reliable.
Many Windows setups do not provide a simple built-in brightness slider for external monitors, and hardware monitor controls can be slow, inconsistent, or hidden behind physical buttons. Display Dimmer was built to solve that problem with a cleaner app experience, practical automation, and fallback behavior for real-world monitor setups.
Display Dimmer's answer:
Display Dimmer is built as a native Windows desktop app using C#, WPF, and .NET Framework.
It uses Windows display APIs, DDC/CI monitor control where supported, gamma ramp/software dimming fallback, global hotkey handling, and local app settings to manage brightness, contrast, schedules, app rules, and multi-monitor behavior.
Display Dimmer's answer:
Share your experience with using Codility and Display Dimmer. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codility is a platform that helps companies assess the coding skills of developers. They offer a range of online coding tests and assessments that enable employers to evaluate candidates' technical abilities.
We have no reviews of Display Dimmer yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


- Technical skills: have they got the walk to match the talk? Programming languages on a resume mean little if candidates are unable to demonstrate their hard coding skills. You can test these skills with technical skill tests, such as... - Source: dev.to / over 2 years ago
Codility : Verify and improve coding skills. - Source: dev.to / over 5 years ago
Tracking Display Dimmer since May 2026.
When comparing Codility and Display Dimmer, you can also consider the following products.

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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Easily manage the brightness of your monitors in Windows from the system tray.
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CodeSignal is the leading assessment platform for technical hiring.
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f. lux is a piece of software for Windows, Mac, Linux, iOS, and Android that provides a blue light filter over your screen. Research suggests limiting our exposure to blue light in the hours before bedtime can help us fall asleep faster.
Compare f.lux to Codility or Display Dimmer:


Control the real brightness of your monitors directly from your Mac - no need to touch the buttons on your Monitor.
Compare DisplayBuddy to Codility or Display Dimmer: