
Toggl
Clockify
ManicTime
RescueTime
TopTracker
Time Doctor
timeBuzzer
Cattr is a free open-source self-hosted time tracker with desktop clients for windows, mac, linux.

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

Which is more popular?
Based on our record, Codewars seems to be a lot more popular than Cattr. While we know about 160 links to Codewars, we've tracked only 2 mentions of Cattr.
Website, pricing, platforms and company facts side by side.
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| Website | cattr.app | codewars.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
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.
Walkthroughs and reviews on video.
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Codewars Review & Tips
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How often each product is chosen within a category, 0–100% relative to the other.


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


We have no reviews of Cattr yet. Be the first one to post
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...
Recommendations tracked on public social media and blogs since March 2021.


Cattr is a self-hosted time tracker. Helpful if you find yourself on multiple devices, even if you are the only one using it. Source: over 3 years ago
Cattr, Youtrack, Activity watch - this is my search for an application to manage my projects and track the time spent on them. The closest thing to the ideal is the online service Trackabi. Youtrack is too fancy, more like Jira. Cattr... Source: over 5 years ago
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
When comparing Cattr and Codewars, you can also consider the following products.

Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Compare Toggl to Cattr or Codewars:

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.
Compare Codecademy to Cattr or Codewars:

Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.
Compare Clockify to Cattr or Codewars:

Download and solve practice problems in over 30 different languages.
Compare Exercism to Cattr or Codewars:

Track your computer usage and use collected data to accurately tag time.
Compare ManicTime to Cattr or Codewars:

Practice and level up your development skills and prepare for technical interviews.
Compare LeetCode to Cattr or Codewars: