
Codecademy
Exercism
Treehouse
edX
LeetCode
Coursera
Pantheon
Achieve code mastery through challenge.

When I Work
Deputy
ResourceGuru
Float
Ganttic
Shiftee
Bizimply
Sling is a free shift scheduling and communication software. It is built around four main features - shifts, messages, newsfeed and tasks, making it possible for managers to organize all aspects of their work on a single platform.
Which is more popular?
Based on our record, Codewars seems to be a lot more popular than Sling. While we know about 160 links to Codewars, we've tracked only 7 mentions of Sling.
Website, pricing, platforms and company facts side by side.
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| Website | codewars.com | getsling.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
Codewars is recommended for beginner to advanced programmers who enjoy learning through practice and are interested in improving their algorithmic thinking and coding skills in a gamified environment. It is particularly beneficial for those preparing for coding interviews or seeking to reinforce their programming knowledge in a fun and interactive way.
Overall verdict
Why this product is good
Recommended for
Sling is highly recommended for small to medium-sized businesses, especially those in retail, hospitality, or any sector where shift scheduling is integral. It is particularly useful for managers looking to streamline operations, enhance team communication, and improve overall staff management.
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 Codewars and Sling. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Edabit offers a learning experience similar to learning a new language, focusing on smaller and more frequent exercises that build proficiency over time. Like Codewars, Edabit provides many challenges that increase in...
In conclusion, while Leetcode remains a valuable resource for coders, the platforms listed above offer varied approaches to learning and improving coding skills. Whether you're drawn to the gamified learning...
This LeetCode alternative has excellent features for anyone looking to sharpen their coding skills. Codewars uses kata, which are small coding exercises that are community developed to help you master your language of...
Sling offers a wide variety of integrated tools — everything from scheduling, time tracking, and communication to employee documents, team task management, and labor cost control — to help you streamline your...
Sling’s scheduling abilities aren’t unlike many of the other apps on this list. However, one stand-out feature is the fact that it comes with an availability tracker. That way, you can ensure that you only schedule...
Recommendations tracked on public social media and blogs since March 2021.


Recently, I was working on a coding kata on codewars.com. Early on, I started thinking that a potential solution might utilize recursion, a concept that involves a function calling itself. However, I quickly realized that my grasp of... - Source: dev.to / almost 3 years ago
Get more involved. Look into internships and junior SWE positions to get a sample of what you'd be applying for once you graduate. Solve coding challenges, start working on a portfolio of your personal works. I recommend codewars.com for... Source: almost 3 years ago
I'd recommend to play around with some basic coding challenges on leetcode.com or codewars.com. If the course prepared you well you won't find this useful, but playing around with them will make sure that you are comfortable with basics... Source: about 3 years ago
Using Sling (https://getsling.com/) for a distributed CS team. It's working pretty well. We're spread across six timezones, been using it for five months. Free version's done well enough for us. Source: about 4 years ago
If you want to try a free product, Sling scheduling app is good. You can google the reviews to see if that match your needs. Source: over 4 years ago
But I think you might want to look at some more dedicated scheduling software like Sling. Source: over 4 years ago
When comparing Codewars and Sling, you can also consider the following products.

Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.
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When I Work is an employee scheduling and communication app using the web, mobile apps, text messaging, social media, and email.
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Download and solve practice problems in over 30 different languages.
Compare Exercism to Codewars or Sling:

Deputy is a software for employee scheduling, time and attendance and communication management.
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Treehouse is an award-winning online platform that teaches people how to code.
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Resource management software that helps teams schedule with clarity, plan with flexibility, and deliver projects with confidence.
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