
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.

Sibelius
MuseScore
Knock
Finale
Flat for Education
MuseScore.org
Guitar Pro
Online collaborative music score and tab editor, accessible from any device
Which is more popular?
Flat might be a bit more popular than CheckIO. We know about 60 links to it since March 2021 and only 46 links to CheckIO.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | checkio.org | flat.io |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CheckIO yet.
A great and easy-to-use music notation editor on iOS. Flat is an app that lets you create, edit, playback, print and export your sheet music and tabs. Cloud-based, you can also edit scores with your web browser and collaborate in real-time across devices with friends and colleagues.
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
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CheckIO and Flat.
Flat's answer:
Extremely Intuitive Layout, Collaboration feature and cross-device usage
Flat's answer:
Flat is perfect for beginners and professionals alike.
Share your experience with using CheckIO and Flat. 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 Flat 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
Unless a piece you want has been recreated or arranged on MuseScore or flat.io, you must buy your own music unless someone wants to give some old music to you. Source: over 3 years ago
I was able to do this with flat.io. Source: over 3 years ago
The web-based options are, unsurprisingly, more limited. flat.io is pretty bad, Noteflight is better but still very limited and quite bad to use. There's some more niche stuff like Unison but it might not be the most accessible. Source: over 3 years ago
When comparing CheckIO and Flat, you can also consider the following products.


Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Compare Sibelius to CheckIO or Flat:

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

Our goal is to let musicians from all over the world create and share their works, as well as to make learning music exciting, easy and available for all.
Compare MuseScore to CheckIO or Flat:

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