
LeetCode
Codility
CodeSignal
iMocha
HackerEarth
Codewars
TestGorilla
HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

Duet Display
Air Display
spacedesk
Luna Display
DisplayPad
Mountie
Splashtop Wired XDisplay
iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.

Which is more popular?
Based on our record, HackerRank seems to be a lot more popular than iDisplay. While we know about 67 links to HackerRank, we've tracked only 1 mention of iDisplay.
Website, pricing, platforms and company facts side by side.
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| Website | hackerrank.com | getidisplay.com |
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What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.
Overall verdict
Why this product is good
Recommended for
iDisplay is recommended for remote workers, graphic designers, developers, and anyone who benefits from increased screen real estate. It's especially useful for those who travel frequently or work in environments where setting up multiple traditional monitors is impractical.
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HackerRank and iDisplay. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


What are LeetCode and LeetCode alternatives good for?LeetCode💡Interested in leveling up your career? Apply to the Formation Fellowship...
HackerRank’s challenges cover a wide range of topics and difficulty levels, allowing developers to enhance their problem-solving skills and learn new algorithms and data structures. The competitive nature of...
HackerRank offers a wide array of challenges across various domains such as algorithms, mathematics, SQL, and functional programming. Its interface is user-friendly, and the platform provides detailed feedback on...
As with most of the apps on our list, iDisplay streams video at 60 frames per second. Another feature of iDisplay is that it supports multitouch on all devices. Also, iDisplay lets you connect more than one device to...
Using iDisplay, you can convert your Android device or your iPad into an extended screen for your primary PC. It supports wired as well as a wireless connection for up to three screens at once.
Looking for a touch screen display window than iDisplay is your tool. It converts the iPad and iPhone to a second touch screen display. It can instantly turn your iPad device for the multi-screen show, which is...
Recommendations tracked on public social media and blogs since March 2021.


This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago
I have done some research and found iDisplay. However that only works for windows, macOS and android and I dont think it would work over wine. Source: about 3 years ago
When comparing HackerRank and iDisplay, you can also consider the following products.

Practice and level up your development skills and prepare for technical interviews.
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With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
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Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
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Air Display allows extra screens to extend the display size of a Mac desktop. The company behind the product is Avatron Software, which was founded in 2008. Read more about Air Display.
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CodeSignal is the leading assessment platform for technical hiring.
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spacedesk expands the Windows desktop computer screen to other computers over the local area...
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