We measure your training. Here's how.
Most brain-training apps ask you to take their word for it. We'd rather show our work. These pages explain — in plain language — how a CogDojo session adapts to you, how your Brain Fitness Index is calculated, and where we draw the line on what training can do.
How it works
Two-to-three-minute sessions, one skill at a time, with difficulty that follows you. The mechanics of a CogDojo session, start to finish.
Brain Fitness Index
One 0–100 score for your whole brain training — a weighted average of your six category ratings. Here is exactly how we calculate it.
Adaptive difficulty
Every skill carries an Elo rating that maps to one of five difficulty bands. We keep each session in your stretch zone — never a wall, never a yawn.
Our approach
What we measure, what we claim, and what we deliberately don't. CogDojo is built for engagement and measurement — not medical outcomes.
Honest measurement over bold promises
CogDojo is a measurement and habit tool. It turns short daily practice into numbers you can watch move: a rating for each cognitive skill, a single Brain Fitness Index, and a read on how you compare to people in your own age group. We designed it to keep you coming back and to make your progress visible — nothing more, and we're careful not to imply otherwise.
The wider research on whether brain training transfers to everyday life is genuinely mixed, and we won't pretend it isn't. So we don't claim CogDojo makes you smarter at work, school, or driving, and we don't claim it prevents cognitive decline or dementia. What we do claim is simple and testable: it measures your performance on our games over time, consistently and transparently.