
Codewars
Exercism
LeetCode
CodinGame
CodeCombat
HackerRank
Google's Python Class
CheckIO is a web site with a mission: To teach JavaScript and Python coding skills through a game-playing interface. It is designed to teach new skills or improve existing skills through completing challenges.

VivaldiFox
NightOwl
Firefox Color
Night Owl (Firefox Theme)
This project aims at creating a universal dark theme for Firefox while adhering to the modern...

Which is more popular?
Based on our record, CheckIO seems to be more popular. It has been mentioned 46 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | checkio.org | overdodactyl.github.io |
| Pricing | — | |
| Listed in |
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
No analysis of ShadowFox yet.
Walkthroughs and reviews on video.
Intro Video. How to get maximum from CheckiO
No ShadowFox 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.


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


CheckiO is a platform with coding games created for different levels of programmers, from beginners to advanced levels. Using fun and engaging methods, you can use coding games to solve challenges in TypeScript and...
CheckIO is available in English and Spanish. The platform was designed by a group of engineers and now has a number of customers all over the globe who may use it to improve their programming speed and abilities by...
Checkio is the most whimsical HackerRank alternative on this list. It’s also focused on two languages: Python and TypeScript. On this site you’ll be thrown into a gamer’s paradise that includes robot mollusks and...
We have no reviews of ShadowFox yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Have you heard of CheckIO (https://checkio.org/)? They have a gameified "Mario world" of coding challenges that are smaller and come with more explanation, tests to guide you through edge cases and provide hints. The challenges start... Source: almost 3 years ago
Cyber isn't gonna be a light switch, where you can flip it and be good. Don't be too hard on yourself. Start with some hands on stuff like https://tryhackme.com or checkio.org. You could look at certs like Security+ or CySA+ for some... Source: about 3 years ago
Much better to get your hands dirty than watching the videos. Try: https://checkio.org/. Source: over 3 years ago
Tracking ShadowFox since Mar 2021.
When comparing CheckIO and ShadowFox, you can also consider the following products.


An add-on that allows colouring Firefox in a Vivaldi style fashion
Compare VivaldiFox to CheckIO or ShadowFox:

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

Easily toggle your Macs Dark Mode with this menubar app.
Compare NightOwl to CheckIO or ShadowFox:

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