
Scrimba
Codédex
CodeCrafters
Data Protocol
Codelita
Eloquent JavaScript
The State of JavaScript 2018
A free resource for learning and developing in JavaScript

Cognitive Coaching
BetterHelp
Calm
DreamBox Learning Math
Free IQ Test
QTKTest
Headspace
Free brain tests you can take right now: reaction time, memory span, attention, typing and click speed. One honest number per test, and what it does not mean.

Which is more popular?
Based on our record, JavaScript.com seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | javascript.com | cognitivedrill.com |
| Pricing | — | |
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What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JavaScript.com and CognitiveDrill.
CognitiveDrill's answer:
(Note: Since CognitiveDrill is a free, sign-in-free web platform for general users, you can list the primary user segments instead)
Competitive esports players and gamers tracking reaction speed
Students and professionals benchmarking memory and typing performance
Self-quantifiers and productivity enthusiasts tracking daily cognitive performance
CognitiveDrill's answer:
CognitiveDrill focuses strictly on honest, precision measurement rather than inflated brain-training claims. It starts timing the millisecond a stimulus renders on the screen, throws out cheap guesses (<100ms), uses median scoring to eliminate luck, and benchmarks results directly against real reference distributions.
CognitiveDrill's answer:
Unlike platforms that charge subscriptions or make exaggerated claims about increasing intelligence, CognitiveDrill is 100% free, requires zero sign-in, and offers over 40 fast, sub-two-minute laboratory tests focused purely on accurate benchmarking and personal tracking.
CognitiveDrill's answer:
Gamers, student athletes, developers, productivity enthusiasts, and anyone looking to track baseline cognitive metrics—such as reaction time, digit span, and processing speed—using precise, no-nonsense tests.
CognitiveDrill's answer:
It was built out of frustration with online brain-training tools that lock simple tests behind paywalls and market unproven claims about "brain age." CognitiveDrill was created as a lightweight, accessible alternative to deliver honest, accurate cognitive benchmarks directly in the browser.
CognitiveDrill's answer:
Modern Web Stack (HTML5, CSS3, JavaScript/TypeScript), HTML5 Canvas API, and Web Audio API for precise millisecond-level stimulus rendering and timing.
Share your experience with using JavaScript.com and CognitiveDrill. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


The best resource I know of is Javascript.com for learning Javascript for the first time. It's made by Pluralsight which is a site that contains courses. - Source: dev.to / over 4 years ago
Tracking CognitiveDrill since Aug 2026.
When comparing JavaScript.com and CognitiveDrill, you can also consider the following products.

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The world's largest therapy service. 100% online.
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Programming exercises for experienced engineers.
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Calm.com can help you reduce stress and increase calm.
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