Brain games
without the BS.
Your brain changes every time you use it. Science calls it neuroplasticity. We call it practice.
A proper little daily workout for attention, processing speed and working memory. We measure how you do and show you honest numbers — no miracle cures, no "delay dementia" promises, no fine print. Just sharp, satisfying games.
Most brain-training apps oversell what they can do — promising sharper memory, protection from decline, even a higher IQ. We don't. CortexCrunch trains specific skills you can measure — and we're upfront about what that does and doesn't mean. Read the science →
Twenty-eight games. Every skill. All free.
More free games than anywhere else — each one targets a different cognitive skill, and your scores save right here on your device. Filter by what you want to train.
Pulse
Tap the instant the screen flips.
Play → Speed & accuracyAim Trainer
Pop 30 targets fast.
Play → Working memoryEcho
Watch the sequence, repeat it back.
Play → Short-term memoryNumber Memory
Memorise the number.
Play → AttentionStroop
Name the ink colour, ignore the word.
Play → Processing speedMental Math
Solve as many as you can in 60s.
Play → Fluid memoryN-Back
Track positions N steps back.
Play → Visual scanningVisual Search
Find the odd one out.
Play → Recognition memoryVerbal Memory
Seen this word or is it new?
Play → Working memoryGrid Recall
Click numbers in order from memory.
Play → Spatial memoryVisual Memory
Remember which tiles flashed.
Play → Processing speedTyping Speed
Words per minute, with accuracy.
Play → Attention & scanningSchulte Table
Find 1 to 25 in order.
Play → InhibitionFlanker
Follow the middle arrow, ignore the rest.
Play → Spatial reasoningRotation
Same shape rotated, or a mirror image?
Play → Logical reasoningSequence
Spot the pattern, pick the next number.
Play → ConcentrationMemory Match
Flip cards to find all the matching pairs.
Play → Verbal fluencyWord Scramble
Unscramble the letters into real words.
Play → Working memoryReverse Recall
Memorise the digits, type them back in reverse.
Play → Spatial spanBlock Path
Follow the path of flashing blocks, then retrace it.
Play → Memory updatingLast Three
Letters stream past — recall the last three.
Play → Impulse controlGreen Light
Tap green fast. Never tap red.
Play → Task switchingTrail Switch
Connect 1-A-2-B… as fast as you can.
Play → Time perceptionTempo
Stop the hidden clock at exactly the right moment.
Play → Perceptual speedTwin Check
Are the two symbol strings identical? Decide fast.
Play → Number senseQuick Compare
Which side is bigger? Maths at a glance.
Play → EstimationDot Count
Dots flash for a blink — how many were there?
Play → Verbal reasoningOdd One Out
Three belong together. Find the impostor.
Play →Numbers that stay honest
No claims, no catch
We won't tell you this prevents dementia or raises your IQ. It's a measurable workout for real skills — and it's genuinely fun.
Honest scoring
Reaction time in real milliseconds. Memory span in real digits. Percentiles clearly labelled as estimates, not diagnoses.
Private by default
No account. No login. Your scores live in your browser, not our database. Close the tab and nothing follows you.
Who uses CortexCrunch?
One honest little gym for the mind — used across very different lives, for very different reasons.
Students & exam-takers
For the working memory, focus and processing speed that studying leans on. Five honest minutes between revision blocks.
Older adults
Keeping the mind active and engaged. Speed-based practice is the most encouraging area of the research — explored honestly, with no promises.
Professionals
A quick reset for attention and reaction speed between deep-work sprints — measurable, and a little bit addictive.
People healing
Rebuilding focus at their own pace. Cognitive tasks like these are used in rehabilitation — here they're gentle practice, on your terms, not therapy.
Parents & kids
Screen-light games families actually enjoy together — and quietly exercise memory and attention while they're at it.
Athletes & gamers
Sharpening reaction time and decision speed — the one area where studies show trainable, transferable gains.
Latest research explainers from the CortexCrunch Blog
Evidence-based deep dives into working memory, attentional gating, synaptic plasticity, and executive function — grounded in peer-reviewed neuroscience.
How Acetylcholine and the NBM Sharpen Your Brain's Focus
Discover how cholinergic neuromodulation from the Nucleus Basalis of Meynert sharpens cortical receptive fields to supercharge perceptual learning.
2026-10-16 · neuroscience · perception · attentionThe Superior Colliculus: How Your Brain Blanks Out Reality
Your eyes flick roughly three times a second, yet the world never blurs. Here is how the superior colliculus steers your gaze before you even notice.
2026-10-15 · neuroscience · cognition · memoryDorsolateral Prefrontal Cortex: Cognitive Load and Working Memory
Discover how the dorsolateral prefrontal cortex manages cognitive load, why working memory bottlenecks analytical thought, and how to offload mental strain.
2026-10-14 · neuroscience · cognition · memoryBasal Ganglia Gating: How CSTC Loops Control Cognitive Flexibility
Explore how cortico-striatal-thalamocortical (CSTC) loops act as the brain's hardware router, gating working memory updates and goal-directed switching.
2026-10-13 · neuroscience · memory · sleepHippocampal Sharp-Wave Ripples: How Sleep Replays Your Day
Hippocampal sharp-wave ripples replay waking memories at lightning speed during non-REM sleep to turn fragile moments into lasting neocortical storage.
2026-10-12 · neuroscience · cognition · attentionHow Locus Coeruleus-Norepinephrine Controls Focus and Exploration
Discover how the locus coeruleus-norepinephrine system and adaptive gain theory balance laser focus and restless exploration in the human brain.
CortexCrunch is a cognitive practice tool, not a medical device. The activities here are inspired by research in cognitive science, but we make no claims about treating, diagnosing or preventing any condition. Think of it as a gym for your mind — the benefits depend on consistent practice.
Three minutes. Right now.
No download, no email, no "start your free trial." Pick a game and go.
Start the daily workout →