VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

Lumosity
Elevate
BrainHQ
NeuroNation
Brainturk
Human Benchmark
CogniFit
A free web-based brain trainer for developing memory, attention, reaction speed, and logical thinking through short tests and daily exercises.

Which is more popular?
Based on our record, Eloquent JavaScript seems to be more popular. It has been mentioned 218 times since March 2021.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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| Website | eloquentjavascript.net | brainexerciseapp.com |
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| Platforms | — | |
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In their own words, as submitted to SaaSHub.

No description of Eloquent JavaScript yet.
Brain Exercise App is a free web-based brain trainer for developing memory, attention, reaction speed, and logical thinking. Take short interactive tests, complete daily exercises, and receive clear results. The app includes tests for reaction speed, attention, numerical and visual memory,...
What each product offers, as listed by its team.

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 Brain Exercise App yet.
Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
More videos
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How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Eloquent JavaScript and Brain Exercise App.
Brain Exercise App's answer:
Brain Exercise App is a free web-based brain trainer for developing memory, attention, reaction speed, and logical thinking. Take short interactive tests, complete daily exercises, and receive clear results. Ready-made daily workouts help you train regularly without having to choose exercises yourself. The app saves your training history, shows your personal bests, and lets you track changes in your results.
Brain Exercise App's answer:
You can start training for free and without mandatory registration—on a computer, smartphone, or tablet. Brain Exercise App is suitable for both a quick mental warm-up and regular training at your own pace. The app includes tests for reaction speed, attention, numerical and visual memory, spatial reasoning, and pattern recognition.
Brain Exercise App's answer:
Brain Exercise App is for people who want to develop memory, attention, reaction speed, and logical thinking through short tests and daily exercises. Programs for adults, seniors, and children are also available.
Brain Exercise App's answer:
Brain Exercise App uses TypeScript and Vite for the frontend, with a Node.js and Express backend.
Share your experience with using Eloquent JavaScript and Brain Exercise App. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you haven’t read Eloquent JavaScript , go check it out. It’s one of my all-time favourite programming books — hands down. - Source: dev.to / about 1 year ago
Videos, blogs, text-based teachings, YouTube project-based learning, books, and the like are all examples of various methods and mediums of acquiring skills, especially in the software engineering industry. As I continue to navigate... - Source: dev.to / almost 2 years ago
Seconded. I won't recommend it and no one I know has recommended it for a decade. It's hard for someone who doesn't know JS to know which parts has changed and is no longer the way to do things. https://github.com/getify/You-Dont-Know-JS... - Source: Hacker News / about 2 years ago
Tracking Brain Exercise App since Sep 2026.
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