🎮 Games
Free brain-training games on raatools — vision training today, more coming soon.
Four vision-training games: braille practice, decode dots, search-the-screen, typing test.
Open tool →Memorize icons, then find them again — visual short-term memory training.
Open tool →Timed quizzes with live scoreboards — resistor codes, subnetting, elements, maths, physics and more.
Open tool →Practice games built on the same material as the tools — resistor colour codes, unit conversions, subnetting, mental arithmetic, the periodic table.
The idea is straightforward: a calculator gives you an answer, and repetition gives you recall. If you are learning colour bands or subnet boundaries, drilling them beats reaching for a decoder every time.
Which tool do I want?
| If you… | Use |
|---|---|
| You want to train visual attention and memory | Vision Games |
| You want a short-term memory drill | Kim's Game |
| You want timed drills on tools material | Quiz Games |
Why drilling beats looking it up
For anything you use constantly, recall is faster than lookup by a wide margin — not just in seconds saved, but because holding a value in your head leaves your attention on the problem instead of on a search. An engineer who reads resistor bands directly is doing something different from one who decodes them one at a time.
Spaced repetition is what makes that stick. Short sessions spread over days consolidate far better than one long session, which is why these are built as two-minute drills rather than something you sit down to. Getting an answer wrong and immediately seeing the right one is also more effective than passive review — the retrieval attempt is what does the work, even when it fails.