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

Wallpaper Engine
Wallper
Backdrop
Lively Wallpaper
Wallspace.app
ScreenPlay
iWallpapers HD
Walyro is a video wallpaper app for Mac. Set your own clips as live wallpapers, with per-display control, offline playlists, and menu bar controls.

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 | walyro.com |
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| Company | — | 2026 |
| 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....
Walyro is a live wallpaper app for Mac. Instead of pulling from an online gallery, it turns your own videos into animated desktop wallpapers and keeps everything on your device. Drop in an MP4 or MOV and it plays as your background, up to 4K. You can preview a clip on each display before applying...
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
An Introduction to Codility: The Tech Hiring Platform for Engineering Teams
Walyro: Live Video Wallpapers for Mac
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Codility and Walyro.
Walyro's answer:
Most Mac wallpaper apps hand you a gallery to browse. Walyro starts from your own footage instead. You point it at your MP4 or MOV clips and it plays them as live wallpapers up to 4K, with a different one on each display. The whole library stays on your Mac, with no online catalog, no account, and no tracking. It's a native Swift and SwiftUI app, so it pauses on fullscreen and eases off on battery to stay light on the CPU.
Walyro's answer:
Choose Walyro if you want your own videos on your desktop rather than a prebuilt gallery, and if you'd rather keep everything on your Mac. Nothing uploads, there's no account, and there's no subscription: you download it free and pay once to unlock the full app. It still covers what the others are known for, per-display wallpapers, up to 4K, and playlists that rotate on their own, while staying native and light on the CPU. If what you want is a large online catalog of ready-made wallpapers, a gallery-first app may suit you better. Walyro is for people who want to use their own clips.
Walyro's answer:
Mac users who want their desktop to feel personal and who care about keeping files on their own machine. That includes people coming from Wallpaper Engine on Windows who want a native Mac option, multi-monitor setups that want a different scene on each screen, and anyone with their own clips (footage they shot, renders, or edits) who would rather use those than pick from a stock library. The common thread is wanting control over the wallpaper without sending anything to the cloud.
Walyro's answer:
I wanted my own videos living on my desktop without uploading them to someone's cloud or making yet another account. The Mac apps I tried were built around their own galleries, and Wallpaper Engine, the app people always point to, doesn't run on Mac at all. So I built the one I wanted: point it at your own clips, keep the whole library on the device, and make it feel native instead of a web wrapper. That starting point shaped the rest, from previewing each display before you apply a wallpaper to pausing playback the moment you go fullscreen or switch to battery.
Walyro's answer:
Walyro is a fully native macOS app, with no Electron or other cross-platform runtime. It's written in Swift with SwiftUI and AppKit for the interface, Combine for state, and AVFoundation and AVKit for video playback. In-app purchases use StoreKit 2, and launch-at-login uses ServiceManagement.
Walyro's answer:
Walyro is a consumer app used by individual Mac users, so there are no named business customers to list.
Share your experience with using Codility and Walyro. 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 Walyro 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 Walyro since Aug 2026.
When comparing Codility and Walyro, 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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Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
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CodeSignal is the leading assessment platform for technical hiring.
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Live 4K wallpapers for your Mac. Fast, native, and fully customizable.
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Backdrop is a simple utility to fill your screen with a giant blank window.
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